@article {6963,
	title = {CONTRASTS BETWEEN URACIL AND THYMINE IN REACTION WITH HYDROGEN ISOTOPES IN WATER},
	journal = {Journal of Physical Chemistry},
	volume = {95},
	number = {24},
	year = {1991},
	note = {ISI Document Delivery No.: GR846Times Cited: 10Cited Reference Count: 28},
	month = {Nov},
	pages = {10204-10207},
	type = {Article},
	abstract = {Using the level crossing resonance technique, it has been possible to identify the measure the relative yields of free radicals formed by addition of muonium across the C = C group at carbon atoms 5 and 6 in uracil, thymine, and 6-methyluracil. The C(5) and C(6) adduct ratio is about 1 in uracil but reduces approximately 0.15 in thymine due to presence of -CH3 on C(5). This considerable steric effect shown by muonium contrasts the situation with ordinary H atoms and underlines the importance of zero-point vibrational motion in determining stereospecific directional effects, even for efficient reactions. Proton hyperfine coupling constants of the free radicals formed from addition across the C(5) = C(6) double bonds in uracil have been determined. For thiouracil, no addition was evident at C(5) = C(6), suggesting that attack by muonium occurs at the C of C = S to produce a thiyl radical.},
	keywords = {ATOMS, LEVEL-CROSSING-RESONANCE, MICELLE SOLUTIONS, MU-SR, muonium, ORGANIC FREE-RADICALS, RATE CONSTANTS, SOLUTES, SPECTRA, SPECTROSCOPY},
	isbn = {0022-3654},
	url = {<Go to ISI>://A1991GR84600105},
	author = {Barnabas, M. V. and Venkateswaran, K. and Stadlbauer, J. M. and Wu, Z. N. and Walker, D. C.}
}
