Reaction of Perchloro-1,3,5-trisilacyclohexane with Methylmagnesium Chloride

✍ Scribed by Prof. Dr. G. Fritz; Dr. N. Szczepanski

• Publisher: John Wiley and Sons
• Year: 1967
• Tongue: English
• Weight: 127 KB
• Volume: 6
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196710771

✦ Synopsis

of 12 e 1 kcal mole-1 for reaction (1); this value is somewhat smaller than that reported [I], wilhout error limits, for 100 atrn. From the pressure dependence at 23OC, in conjunction with Eq. (2), a volume change, AV, associated with the reaction of 64 f 3 ml/mole is obtained. Both A H and A V decrease with increasing temperature.

The apparent molar volume of KNH2 and Hz in ammonia are 10 c 2 and 110 f 20 ml/mole, respectively, as determined by density measurements at 23 "C and 100 atm. The molar volume of ammonia under these conditions is 27.8 ml. The apparent molar volume of the KC ions is reported as 3 rnl/mole~3b~. With these values and an apparent "volume" of the solvated electrons of 98 & 15 ml/mole a t 23 O C and 100 atm is obtained. By taking into consideration the temperature dependence of the volume of the solvated electrons, estimated from the variation of absorption frequency with temperature[8l, a value of 84 ml/ mole at -33 "C results; within the limits of error, this value is the same as that for the spin-compensated electron pairs.