@article {4934,
	title = {The electronic spectrum of germanium methylidyne (GeCH), the prototypical organogermanium compound},
	journal = {Journal of Chemical Physics},
	volume = {112},
	number = {19},
	year = {2000},
	note = {ISI Document Delivery No.: 309QCTimes Cited: 11Cited Reference Count: 30},
	month = {May},
	pages = {8417-8425},
	type = {Article},
	abstract = {The (A) over tilde (2)Sigma(+)-(X) over tilde (2)Pi(i) electronic transition of jet-cooled germanium methylidyne has been recorded in the 730-555 nm region by laser-induced fluorescence techniques. The radical was produced in a pulsed electric discharge using tetramethylgermane as the precursor. The band system consists of perpendicular and vibronically induced parallel bands with upper state frequencies of nu(2){\textquoteright}=638/497 cm(-1) and nu(3){\textquoteright}=990/952 cm(-1) for GeCH/GeCD. The (2)Sigma(+)-(2)Pi(3/2) components of the 0(0)(0) bands of GeCH and GeCD and the 2(0)(1) band of GeCH have been recorded with sufficient resolution to assign the transitions of the Ge-70, Ge-72, Ge-74, and Ge-76 isotopomers. The rotational constants of the various hydrogen and germanium isotopomers were used to derive the following molecular structures: r(0)"(Ge-C)=1.775 79(21) Angstrom, r(0)"(C-H)=1.0673(12) Angstrom, r(0){\textquoteright}(Ge- C)=1.673 66(8) Angstrom, and r(0){\textquoteright}(C-H)=1.0589(5) Angstrom. The ground state germanium-carbon bond length is typical for a Ge=C double bond, but in the excited state it corresponds to a triple bond. This is a consequence of promotion of an electron from a nonbonding sigma orbital to a pi bonding orbital to form the ...sigma(1)pi(4)((2)Sigma(+)) excited state. In this study we provide the first experimental value for the length of the germanium-carbon triple bond. (C) 2000 American Institute of Physics. [S0021-9606(00)01619-6].},
	keywords = {MOLECULAR-STRUCTURE, PARAMETERS, SPECTROSCOPY, SYSTEM},
	isbn = {0021-9606},
	url = {<Go to ISI>://000086778300024},
	author = {Smith, T. C. and Li, H. Y. and Clouthier, D. J. and Kingston, C. T. and Merer, A. J.}
}
