1-Pyridine- and 1-Quinuclidine-1-boraadamantane as Models for Derivatives of 1-Borabicyclo[2.2.2]octane. Experimental and Theoretical Evaluation of the B−N Fragment as a Polar Isosteric Substitution for the C−C Group in Liquid Crystal Compounds
作者:Piotr Kaszynski、Serhii Pakhomov、Mikhail E. Gurskii、Sergey Yu. Erdyakov、Zoya A. Starikova、Konstantin A. Lyssenko、Mikhail Yu. Antipin、Victor G. Young、Yurii N. Bubnov
DOI:10.1021/jo802504c
日期:2009.2.20
1-boraadamantane (2, SE = 16.5 kcal/mol). The chemical stability of 2-P and 2-Q, with respect to hydrolytic and oxidative reagents, is high for the pyridine derivative and satisfactory for the quinuclidine complex at ambient temperature, which implies sufficiently high stability of 1-borabicyclo[2.2.2]octane complexes for materials applications. Molecular dipole moments of 6.2 ± 0.1 and 6.0 ± 0.15 D were measured
使用计算方法和对其紧密类似物1-硼烷金刚烷(2)的两种配合物进行的实验研究,评估了1-borabicyclo [2.2.2]辛烷(1)作为液晶结构元素的适用性。1-吡啶-1-硼烷金刚烷[ 2-P,C 14 H 20 BN,P 2 1 / m,a = 8.4404(13)Å,b = 6.8469(10)Å,c = 10.5269( 16)Å,β= 104.712(3)°,Z = 2],1-奎宁环-1-硼酸金刚烷[ 2-Q,C 16 H 28 BN,P2 1 / n,a = 6.6529(3)Å,b = 10.6665(6)Å,c = 19.3817(10)Å,β= 94.689(3)°,Z = 4]和1-吡啶-三甲基硼烷[ 3 -P,C 8 H 14 BN,C cma,a = 6.9875(10)Å,b = 15.011(2)Å,c = 16.556(2)Å,Z = 8]由X射线晶体学测定并