Structures of tetracarbonyl(di-2-pyridylamine)chromium(0), -molybdenum(0) and -tungsten(0) crystallographic and spectroscopic evidence for an intermolecular NH----OC hydrogen bond
作者:R.A. Howie、Georgina Izquierdo、G.P. McQuillan
DOI:10.1016/s0020-1693(00)81713-2
日期:1983.1
The complexes [M(CO)4·dipyam] [M = Cr, Mo, W; dipyam: di-2-pyridylamine, (C5H4N)2NH] are triclinic, space group P, Z = 2. The molybdenum and tungsten complexes are isostructual. Cell dimensions (Cr, Mo, W) are a = 8.436(2), 6.919(1), 6.951(1); b = 8.893(2), 13,385(2), 13.352(2); c = 10.382(2), 8.504(1), 8.455(1) Å; α = 88.8(1), 81.0(1), 81.0(1); β = 82.1(1), 68.3(1), 68.3(1); γ = 65.4(1), 86.1(1),
配合物[M(CO)4 ·双嘧啶] [M = Cr,Mo,W; 二乙胺:二-2-吡啶胺,(C 5 H 4 N)2 NH]是三斜晶系,空间群P ,Z =2。钼和钨配合物是同构的。像元尺寸(Cr,Mo,W)为a = 8.436(2),6.919(1),6.951(1); b = 8.893(2),13385(2),13.352(2);c = 10.382(2),8.504(1),8.455(1)Å;α= 88.8(1),81.0(1),81.0(1); β= 82.1(1),68.3(1),68.3(1); γ= 65.4(1),86.1(1),85.9(1)°。[Mo(CO)4的单晶结构测定·双嘧啶(1266次反射,R = 0.062)显示该络合物为八面体和单核,但相邻分子中未配位的NH基团与羰基氧原子之间的分子间接触足够紧密(H--O calc (2.23Å)才能满足弱氢键的通常标准。晶体中的NH和B