@article {1338,
	title = {Salts of the cobalt(I) complexes [Co(CO)(5)](+) and[Co(CO)(2)(NO)(2)](+) and the Lewis acid-base adduct [CO2(CO)(7)CO-B(CF3)(3)]},
	journal = {Chemistry-a European Journal},
	volume = {12},
	number = {32},
	year = {2006},
	note = {ISI Document Delivery No.: 110YZTimes Cited: 4Cited Reference Count: 60Bernhardt, Eduard Finze, Maik Willner, Helge Lehmann, Christian W. Aubke, Friedhelm},
	month = {Nov},
	pages = {8276-8283},
	type = {Article},
	abstract = {The reaction of [Co-2(CO)(8)] with (CF3)(3)BCO in hexane leads to the Lewis acid-base adduct [CO2(CO)(7)COB(CF3)(3)] in high yield. When the reaction is performed in anhydrous HF solution [Co(CO)(5)][(CF3)(3)BF] is isolated. The product contains the first example of a homoleptic metal pentacarbonyl cation with 18 valence electrons and a trigonal-bipyramidal structure. Treatment of [Co-2(CO)(8)] or [Co(CO)(3)NO] with NO+ salts of weakly coordinating anions results in mixed crystals containing the [Co(CO)(5)](+)/[Co(CO)(2)(NO)(2)](+) ions or pure novel [Co(CO)(2)(NO)(2)](+) salts, respectively. This is a promising route to other new metal carbonyl nitrosyl cations or even homoleptic metal nitrosyl cations. All compounds were characterized by vibrational spectroscopy and by single-crystal X-ray diffraction.},
	keywords = {ALUMINUM HALIDES, ANIONS, carbonyl ligands, cobalt, density, density functional calculations, DICOBALT OCTACARBONYL, EXCHANGE, LIGANDS, METAL-CARBONYL CATIONS, NITRIC-OXIDE, NITROSYL, SOLID-STATE, SPECTROSCOPIC PROPERTIES, vibrational spectroscopy, VIBRATIONAL-SPECTRA},
	isbn = {0947-6539},
	url = {<Go to ISI>://000242418600008},
	author = {Bernhardt, E. and Finze, M. and Willner, H. and Lehmann, C. W. and Aubke, F.}
}
@article {1059,
	title = {Homoleptic, sigma-bonded octahedral [M(CO)(6)](2+) cations of iron(II), ruthenium(II), and osmium(II): Part 1: Syntheses, thermochemical and vibrational characterizations, and molecular structures as [Sb2F11](-) and [SbF6](-) salts. A comprehensive, compa},
	journal = {Inorganic Chemistry},
	volume = {44},
	number = {12},
	year = {2005},
	note = {ISI Document Delivery No.: 934LPTimes Cited: 5Cited Reference Count: 100},
	month = {Jun},
	pages = {4189-4205},
	type = {Article},
	abstract = {Homoleptic octahedral, superelectrophilic sigma-bonded metal carbonyl cations of the type [M(CO)(6)](2+) (M = Ru, Os) are generated in the Bronsted-Lewis conjugate superacid HF/SbF5 by reductive carbonylation Of M(SO3F)(3) (M = Ru, Os) or OsF6. Thermally stable salts form with either [Sb2F11](-) or [SbF6](-) as anion, just as for the previously reported [Fe(CO)(6)](2+) cation. The latter salts are generated by oxidative (XeF2) carbonylation of Fe(CO)(5) in HF/ SbF5. A rationale for the two diverging synthetic approaches is provided. The thermal stabilities Of [M(CO)(6)][SbF6](2) salts, studied by DSC, range from 180 degrees C for M = Fe to 350 degrees C for M = Os before decarbonylation occurs. The two triads [M(CO)(6)][SbF6](2) and [M(CO)(6)][Sb2F11](2) (M = Fe, Ru, Os) are extensively characterized by single-crystal X-ray diffraction and vibrational and C-13 NMR spectroscopy, aided by computational studies of the cations. The three [M(CO)(6)][SbF6](2) salts (M = Fe, Ru, Os) crystallize in the tetragonal space group P4/mnc (No. 128), whereas the corresponding [Sb2F11](-) salts are monoclinic, crystallizing in space group P2(1)/n (No. 14). In both triads, the unit cell parameters are nearly invariant of the metal. Bond parameters for the anions [SbF6](-) and [Sb2F11](-) and their vibrational properties in the two triads are completely identical. In all six salts, the structural and vibrational properties of the [M(CO)(6)](2+) cations (M = Fe, Ru, Os) are independent of the counteranion and for the most part independent of M and nearly identical. Interionic C center dot center dot center dot F contacts are similarly weak in all six salts. Metal dependency is noted only in the C-13 NMR spectra, in the skeletal M-C vibrations, and to a much smaller extent in some of the C-O stretching fundamentals (A(1g) and T-1u). The findings reported here are unprecedented among metal carbonyl cations and their salts.},
	keywords = {ANTIMONY PENTAFLUORIDE, CRYSTAL-STRUCTURE, ELECTRON-DIFFRACTION, HEXAKIS(CARBONYL)IRON(II), INFRARED SPECTRA, MAS-NMR-SPECTRA, METAL-CARBONYL CATIONS, PHASE, SOLVENT SYSTEM, SUPERACID MEDIA, UNDECAFLUORODIANTIMONATE(V), WEAKLY COORDINATING ANIONS},
	isbn = {0020-1669},
	url = {<Go to ISI>://000229710600021},
	author = {Bernhardt, E. and Bach, C. and Bley, B. and Wartchow, R. and Westphal, U. and Sham, I. H. T. and von Ahsen, B. and Wang, C. Q. and Willner, H. and Thompson, R. C. and Aubke, F.}
}
@article {1059,
	title = {Homoleptic, sigma-bonded octahedral [M(CO)(6)](2+) cations of iron(II), ruthenium(II), and osmium(II): Part 1: Syntheses, thermochemical and vibrational characterizations, and molecular structures as [Sb2F11](-) and [SbF6](-) salts. A comprehensive, compa},
	journal = {Inorganic Chemistry},
	volume = {44},
	number = {12},
	year = {2005},
	note = {ISI Document Delivery No.: 934LPTimes Cited: 5Cited Reference Count: 100},
	month = {Jun},
	pages = {4189-4205},
	type = {Article},
	abstract = {Homoleptic octahedral, superelectrophilic sigma-bonded metal carbonyl cations of the type [M(CO)(6)](2+) (M = Ru, Os) are generated in the Bronsted-Lewis conjugate superacid HF/SbF5 by reductive carbonylation Of M(SO3F)(3) (M = Ru, Os) or OsF6. Thermally stable salts form with either [Sb2F11](-) or [SbF6](-) as anion, just as for the previously reported [Fe(CO)(6)](2+) cation. The latter salts are generated by oxidative (XeF2) carbonylation of Fe(CO)(5) in HF/ SbF5. A rationale for the two diverging synthetic approaches is provided. The thermal stabilities Of [M(CO)(6)][SbF6](2) salts, studied by DSC, range from 180 degrees C for M = Fe to 350 degrees C for M = Os before decarbonylation occurs. The two triads [M(CO)(6)][SbF6](2) and [M(CO)(6)][Sb2F11](2) (M = Fe, Ru, Os) are extensively characterized by single-crystal X-ray diffraction and vibrational and C-13 NMR spectroscopy, aided by computational studies of the cations. The three [M(CO)(6)][SbF6](2) salts (M = Fe, Ru, Os) crystallize in the tetragonal space group P4/mnc (No. 128), whereas the corresponding [Sb2F11](-) salts are monoclinic, crystallizing in space group P2(1)/n (No. 14). In both triads, the unit cell parameters are nearly invariant of the metal. Bond parameters for the anions [SbF6](-) and [Sb2F11](-) and their vibrational properties in the two triads are completely identical. In all six salts, the structural and vibrational properties of the [M(CO)(6)](2+) cations (M = Fe, Ru, Os) are independent of the counteranion and for the most part independent of M and nearly identical. Interionic C center dot center dot center dot F contacts are similarly weak in all six salts. Metal dependency is noted only in the C-13 NMR spectra, in the skeletal M-C vibrations, and to a much smaller extent in some of the C-O stretching fundamentals (A(1g) and T-1u). The findings reported here are unprecedented among metal carbonyl cations and their salts.},
	keywords = {ANTIMONY PENTAFLUORIDE, CRYSTAL-STRUCTURE, ELECTRON-DIFFRACTION, HEXAKIS(CARBONYL)IRON(II), INFRARED SPECTRA, MAS-NMR-SPECTRA, METAL-CARBONYL CATIONS, PHASE, SOLVENT SYSTEM, SUPERACID MEDIA, UNDECAFLUORODIANTIMONATE(V), WEAKLY COORDINATING ANIONS},
	isbn = {0020-1669},
	url = {<Go to ISI>://000229710600021},
	author = {Bernhardt, E. and Bach, C. and Bley, B. and Wartchow, R. and Westphal, U. and Sham, I. H. T. and von Ahsen, B. and Wang, C. Q. and Willner, H. and Thompson, R. C. and Aubke, F.}
}
@article {5221,
	title = {Superelectrophilic tetrakis(carbonyl)palladium(II)- and -platinum(II) undecafluorodiantimonate(V), [Pd(CO)(4)][Sb2F11](2) and [Pt(CO)(4)][Sb2F11](2): Syntheses, physical and spectroscopic properties, their crystal, molecular, and extended structures, and},
	journal = {Journal of the American Chemical Society},
	volume = {123},
	number = {4},
	year = {2001},
	note = {ISI Document Delivery No.: 396RTTimes Cited: 30Cited Reference Count: 181},
	month = {Jan},
	pages = {588-602},
	type = {Review},
	abstract = {{The salts [M(CO)(4)][Sb2F11](2)},
	keywords = {ADJUSTED ABINITIO, basis sets, GOLD(III) FLUOROSULFATE, HEXAKIS(CARBONYL)IRON(II), INFRARED-SPECTRA, MAS-NMR-SPECTRA, METAL-CARBONYL CATIONS, PSEUDOPOTENTIALS, TRANSITION-ELEMENTS, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA, WEAKLY COORDINATING ANIONS},
	isbn = {0002-7863},
	url = {<Go to ISI>://000166650900009},
	author = {Willner, H. and Bodenbinder, M. and Brochler, R. and Hwang, G. and Rettig, S. J. and Trotter, J. and von Ahsen, B. and Westphal, U. and Jonas, V. and Thiel, W. and Aubke, F.}
}
@article {5221,
	title = {Superelectrophilic tetrakis(carbonyl)palladium(II)- and -platinum(II) undecafluorodiantimonate(V), [Pd(CO)(4)][Sb2F11](2) and [Pt(CO)(4)][Sb2F11](2): Syntheses, physical and spectroscopic properties, their crystal, molecular, and extended structures, and},
	journal = {Journal of the American Chemical Society},
	volume = {123},
	number = {4},
	year = {2001},
	note = {ISI Document Delivery No.: 396RTTimes Cited: 30Cited Reference Count: 181},
	month = {Jan},
	pages = {588-602},
	type = {Review},
	abstract = {{The salts [M(CO)(4)][Sb2F11](2)},
	keywords = {ADJUSTED ABINITIO, basis sets, GOLD(III) FLUOROSULFATE, HEXAKIS(CARBONYL)IRON(II), INFRARED-SPECTRA, MAS-NMR-SPECTRA, METAL-CARBONYL CATIONS, PSEUDOPOTENTIALS, TRANSITION-ELEMENTS, UNDECAFLUORODIANTIMONATE(V), VIBRATIONAL-SPECTRA, WEAKLY COORDINATING ANIONS},
	isbn = {0002-7863},
	url = {<Go to ISI>://000166650900009},
	author = {Willner, H. and Bodenbinder, M. and Brochler, R. and Hwang, G. and Rettig, S. J. and Trotter, J. and von Ahsen, B. and Westphal, U. and Jonas, V. and Thiel, W. and Aubke, F.}
}
@article {4473,
	title = {Hexakis(carbonyl)iron(II) undecafluorodiantimonate(V), [Fe(CO)(6)][Sb2F11](2), and -hexafluoroantimonate(V), [Fe(CO)(6)][SbF6](2), their syntheses, and spectroscopic and structural characterization by single crystal X-ray diffraction and normal coordinate},
	journal = {Journal of the American Chemical Society},
	volume = {121},
	number = {31},
	year = {1999},
	note = {ISI Document Delivery No.: 227UKTimes Cited: 32Cited Reference Count: 109},
	month = {Aug},
	pages = {7188-7200},
	type = {Review},
	abstract = {Hexakis/carbonyl iron(LI) undecafluorodiantimonate(V), [Fe(CO)(6)][Sb2F11](2) is conveniently prepared by the oxidative carbonylation of Fe(CO)(5) with XeF2 as external oxidizer in the conjugate Br phi nsted-Lewis superacid HF-SbF5. The colorless compound crystallizes from the reaction medium in high purity. The molecular structure is obtained by single-crystal X-ray diffraction. The cation is a regular octahedron, while the vertex-shared di-octahedral [Sb2F11](-) anion is distorted from D-4h symmetry by bending and rotational processes, due to significant interionic interactions, primarily of the FC type. Washing of [Fe(CO)(6)][Sb2F11](2) with anhydrous HF results in an unusual elution of SbF5 and the quantitative conversion to hexakis(carbonyl)iron(II) hexafluoroantimonate;(V) [Fe(CO)(6)][SbF6](2) The molecular structure of the salt shows octahedral ions with slight tetragonal distortions for the cation (elongation) and the anion (comprsssion). Both salts are thermally stable up to 150 degrees C, The averaged bond distances and the vibrational wavenumbers of [Fe(CO)(6)](2+) are nearly identical in both compounds. The [Fe(CO)(6)](2+) cation, the first and so far only isolated and structurally characterized dipositive, superelectrophilic carbonyl cation formed by a 3d-metal, is further characterized by a normal coordinate analysis (NCA). The obtained force constants are compared to those of the isoelectronic molecule Cr(CO)6. Changes in pi-back-bonding affect the F-CO/CO and F-CO/MC interaction force constants more strongly than the stretching force constants F-CO and F-MC All 13 fundamentals of [Fe(CO)(6)](2+) are detected and assigned with the help of the data obtained from the normal coordinate analysis and density functional calculations published previously. The electronic ground state (1)A(1g), of the [Fe(CO)(6)](2+) cation is established by magnetic susceptibility measurements of polycrystalline [Fe(CO)(6)][SbF6](2) and [Fe(CO)(6)][Sb2F11](2) between and 300 K. The magnetic impurity formed during synthesis is identified as Fe[SbF6](2) which has iron(II) in high spin (T-5(2g)) ground state. Consistent with a diamagnetic ground state are the single line in the Fe-57 Mossbauer spectrum (i.s. = -0.003(8) mm s(-1) relative to alpha-Fe), obtained on polycrystalline samples and the single sharp line in the C-13 NMR spectrum in DF solution at 178 ppm with J (Fe-57-C-13) of 19.2 Hz.},
	keywords = {C-13, COMPLEXES, CONSTANTS, IRON PENTACARBONYL, MAS-NMR-SPECTRA, METAL-CARBONYL CATIONS, MO, MOLECULAR-STRUCTURE, MONOXIDE, VIBRATIONAL-SPECTRA},
	isbn = {0002-7863},
	url = {<Go to ISI>://000082098200003},
	author = {Bernhardt, E. and Bley, B. and Wartchow, R. and Willner, H. and Bill, E. and Kuhn, P. and Sham, I. H. T. and Bodenbinder, M. and Brochler, R. and Aubke, F.}
}
@article {2832,
	title = {THE SYNTHESES AND VIBRATIONAL-SPECTRA OF TETRAKIS(CARBONYL) PALLADIUM(II) AND PLATINUM(II) UNDECAFLUORODIANTIMONATE(V), [PD(CO)4][SB2F11]2, AND [PT(CO)4][SB2F11]2},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {71},
	number = {9},
	year = {1993},
	note = {ISI Document Delivery No.: MC957Times Cited: 54Cited Reference Count: 49},
	month = {Sep},
	pages = {1532-1536},
	type = {Note},
	abstract = {{The reductive carbonylation of either platinum(IV) fluorosulfate, Pt(SO3F)4, or palladium(III) fluorosulfate, Pd(SO3F)3, either in solution of fluorosulfuric acid, HSO3F, or in the solid state with CO at pressures of 0.5 to 2 atmospheres and at 25-degrees-C, affords in high yield complexes of the type M(CO)2(SO3F)2},
	keywords = {ACIDS, CHEMISTRY, COMPLEXES, CONSTANTS, METAL-CARBONYL CATIONS, MOLECULAR-STRUCTURE, MONOXIDE},
	isbn = {0008-4042},
	url = {<Go to ISI>://A1993MC95700029},
	author = {Hwang, G. and Wang, C. and Aubke, F. and Willner, H. and Bodenbinder, M.}
}
@article {7381,
	title = {BIS(CARBONYL)GOLD(I) UNDECAFLUORODIANTIMONATE(V), [AU(CO)2][SB2F11] - SYNTHESIS, VIBRATIONAL AND C-13 NMR-STUDY, AND THE MOLECULAR-STRUCTURE OF BIS(ACETONITRILE)GOLD(I) HEXAFLUOROANTIMONATE(V), [AU(NCCH3)2][SBF6]},
	journal = {Journal of the American Chemical Society},
	volume = {114},
	number = {23},
	year = {1992},
	note = {ISI Document Delivery No.: JW797Times Cited: 110Cited Reference Count: 79},
	month = {Nov},
	pages = {8972-8980},
	type = {Article},
	abstract = {The synthesis of the bis(carbonyl)gold(I) salt, [Au(CO)2] [Sb2F11], is achieved in a two-step procedure: the reduction of gold(III) fluorosulfate, Au(SO3F)3, in HSO3F to give AU(CO)SO3F as an intermediate, followed by solvolysis in liquid antimony(V) fluoride in the presence of carbon monoxide. The use of (CO)-C-13 or (CO)-O-18 permits the synthesis of the corresponding isotopically labeled salts. The compound is thermally stable up to 130-degrees-C. The cation has D(infinity h) symmetry, and all seven fundamentals, three Raman and four IR active modes, are observed. A normal coordinate analysis (NCA) and general valence force-field (GVFF) calculations are carried out and allow comparison to the isoelectronic and isosteric molecular species Hg(CN)2 and [Au(CN)2]-. The near absence of gold to carbon pi-back donation in [Au(CO)2]+ is manifested in strong carbon-oxygen bonds and consequently rather weak gold-carbon bonds, reflected in the highest CO-stretching frequencies so far observed for a metal carbonyl derivative with 2254 (nu1) and 2217 (nu3) cm-1 and a stretching force constant of 20.1 X 10(2) Nm-1. In the C-13 NMR spectrum a single-line resonance at 174 ppm is attributed to ([Au(CO)2]+)-C-13, while the ([Au(CO)]+)-C-13 chemical shift changes from 162 ppm in HSO3F to 158 ppm in magic acid (HSO3F/SbF5). The resonances for ([Au(CO)2]+)-C-13 and ([Au(CO)]+)-C-13 in the same solution are found to undergo coalescence at elevated temperature indicative of slow CO exchange. The coalescence temperature is solvent dependent, 325 K in HSO3F and 395 K in the more dilute HSO3F/SbF5 mixture. Attempts to recrystallize [Au(CO)2] [Sb2F11] from acetonitrile result in the formation of single crystals of [Au(NCCH3)2][SbF6] instead. The compound crystallizes in a cubic unit cell, space group Pa3BAR, with a = 10.250 (2) angstrom and Z = 4. The structure was determined by Patterson and Fourier methods and refined by least-squares techniques to R = 0.023 and R(w) = 0.024 for 147 reflections with I > 3sigma(I). The crystal contains linear [Au(NCCH3)2]+ cations and octahedral [SbF6]- anions, with normal dimensions.},
	keywords = {CHEMISTRY, COMPLEXES, CONSTANTS, CRYSTAL-STRUCTURE, FUNDAMENTAL-BAND, GOLD, HCO+, laser spectroscopy, METAL-CARBONYL CATIONS, RAMAN-SPECTRA},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1992JW79700030},
	author = {Willner, H. and Schaebs, J. and Hwang, G. and Mistry, F. and Jones, R. and Trotter, J. and Aubke, F.}
}
@article {7381,
	title = {BIS(CARBONYL)GOLD(I) UNDECAFLUORODIANTIMONATE(V), [AU(CO)2][SB2F11] - SYNTHESIS, VIBRATIONAL AND C-13 NMR-STUDY, AND THE MOLECULAR-STRUCTURE OF BIS(ACETONITRILE)GOLD(I) HEXAFLUOROANTIMONATE(V), [AU(NCCH3)2][SBF6]},
	journal = {Journal of the American Chemical Society},
	volume = {114},
	number = {23},
	year = {1992},
	note = {ISI Document Delivery No.: JW797Times Cited: 110Cited Reference Count: 79},
	month = {Nov},
	pages = {8972-8980},
	type = {Article},
	abstract = {The synthesis of the bis(carbonyl)gold(I) salt, [Au(CO)2] [Sb2F11], is achieved in a two-step procedure: the reduction of gold(III) fluorosulfate, Au(SO3F)3, in HSO3F to give AU(CO)SO3F as an intermediate, followed by solvolysis in liquid antimony(V) fluoride in the presence of carbon monoxide. The use of (CO)-C-13 or (CO)-O-18 permits the synthesis of the corresponding isotopically labeled salts. The compound is thermally stable up to 130-degrees-C. The cation has D(infinity h) symmetry, and all seven fundamentals, three Raman and four IR active modes, are observed. A normal coordinate analysis (NCA) and general valence force-field (GVFF) calculations are carried out and allow comparison to the isoelectronic and isosteric molecular species Hg(CN)2 and [Au(CN)2]-. The near absence of gold to carbon pi-back donation in [Au(CO)2]+ is manifested in strong carbon-oxygen bonds and consequently rather weak gold-carbon bonds, reflected in the highest CO-stretching frequencies so far observed for a metal carbonyl derivative with 2254 (nu1) and 2217 (nu3) cm-1 and a stretching force constant of 20.1 X 10(2) Nm-1. In the C-13 NMR spectrum a single-line resonance at 174 ppm is attributed to ([Au(CO)2]+)-C-13, while the ([Au(CO)]+)-C-13 chemical shift changes from 162 ppm in HSO3F to 158 ppm in magic acid (HSO3F/SbF5). The resonances for ([Au(CO)2]+)-C-13 and ([Au(CO)]+)-C-13 in the same solution are found to undergo coalescence at elevated temperature indicative of slow CO exchange. The coalescence temperature is solvent dependent, 325 K in HSO3F and 395 K in the more dilute HSO3F/SbF5 mixture. Attempts to recrystallize [Au(CO)2] [Sb2F11] from acetonitrile result in the formation of single crystals of [Au(NCCH3)2][SbF6] instead. The compound crystallizes in a cubic unit cell, space group Pa3BAR, with a = 10.250 (2) angstrom and Z = 4. The structure was determined by Patterson and Fourier methods and refined by least-squares techniques to R = 0.023 and R(w) = 0.024 for 147 reflections with I > 3sigma(I). The crystal contains linear [Au(NCCH3)2]+ cations and octahedral [SbF6]- anions, with normal dimensions.},
	keywords = {CHEMISTRY, COMPLEXES, CONSTANTS, CRYSTAL-STRUCTURE, FUNDAMENTAL-BAND, GOLD, HCO+, laser spectroscopy, METAL-CARBONYL CATIONS, RAMAN-SPECTRA},
	isbn = {0002-7863},
	url = {<Go to ISI>://A1992JW79700030},
	author = {Willner, H. and Schaebs, J. and Hwang, G. and Mistry, F. and Jones, R. and Trotter, J. and Aubke, F.}
}
