Hydrogen bonding and proton localization in complexes of carboxybetaines with phenols and carboxylic acids
作者:Zofia Dega-Szafran、Anna Komasa、Monika Grundwald-Wyspiańska、Mirosław Szafran、Grzegorz Buczak、Andrzej Katrusiak
DOI:10.1016/s0022-2860(96)09357-x
日期:1997.2
6-dichloro-4-nitrophenolate are linked by an O(2)Htctdot;O(1) hydrogen bond with an Otctdot;O distance of 2.424(3) A and the O(2)Htctdot;O(1) angle is 159(3)°. The broad absorption in the solid state FTIR spectra of the investigated complexes varies with ΔpKa, and is typical of complexes with strong hydrogen bonds. The UV spectra of phenol complexes in acetonitrile show a typical absorption for Btctdot;HA and B+Htctdot;A−
摘要 甜菜碱 (BET) 与 2,6-二氯-4-硝基苯酚 (DCNP)、五氯苯酚 (PCP) 和三氟乙酸、三氯乙酸、二氯乙酸、氯乙酸和马来酸以及吡啶甜菜碱 (PBET) 与 DCNP 在溶液和溶液中的复合物通过UV和FTIR光谱和X射线分析研究固态。BET·DCNP的晶体为三斜晶系,空间群P 1 , a = 7.1770(10) A , b = 10.001(2) A , c = 11.241(2) A , α = 108.81(3)°, β = 100.06( 3)°,γ = 106.82(3)°,Z = 2;对于 1871 次观察到的反射,最终的 R 值为 0.033。质子化甜菜碱和 2,6-二氯-4-硝基苯酚通过 O(2)Htctdot;O(1) 氢键连接,Otctdot;O 距离为 2.424(3) A 和 O(2)Htctdot; O(1) 角为 159(3)°。所研究配合物的固态