THE HEATS OF FORMATION OF SOME UNSTABLE GASEOUS HYDRIDES¹

Abstract

HEATS OF ~~' O I~M A T I O NO F UNSTABLE G a s~~v s HYDRIDES 779 results into eq. 15 yields DiscussionIf the attractive forces vanish, 8 = 0 and eq. 16 reduces to Az" = 1, as required for hard spheres.Sumerical solution of eq. 16 for the Flory temperature, 8 , givm

Heats of formation of GeH4, GeF4 and Ge(CH3)4

“…Even the heat of formation of germane (GeH 4 ), the simplest tetravalent Ge molecule is not well established. The only experimental heat of formation of GeH 4 (90.3 ± 2 kJ/mol at 298 K) was determined by bomb calorimetry more than 40 years ago [3]. On the other hand, several GeH 4 theoretical investigations have been reported, among them a Gaussian n theory study, a popular method known to give very accurate results for molecules consisting of first and second row atoms.…”

The enthalpies of formation of bis(dimethylamino)cyanophosphine, (dimethylamino)dicyanophosphine, and tricyanophosphine

“…After correcting this molar energy change for changes in zero-temperature molar energy and for the change in molar enthalpy increment: DD (12) and HCN(g), (6) respectively. An earlier report (11) using the same method gave D f H°m{P(CN) 3 , (10) a value to which some doubt has been ascribed.…”

Kinetics of dichlorosilylene trapping by methane and mechanism and kinetics of the methyldichlorosilane decomposition

“…Methane trapping of SiCl 2 , the dominant intermediate in both decompositions, as per reaction Ϫ 1 was suggested, and data supporting this process are reported here. [7,8] vs. 20.6 kcal /mol [9,10], respectively) necessarily makes the SiCl 2 /CH 4 trapping reaction considerably slower and presumably more difficult to observe.…”