Barclay, Susan J.; Raymond, Kenneth N., Inorganic Chemistry, 1986, vol. 25, # 20, p. 3561 - 3566
作者:Barclay, Susan J.、Raymond, Kenneth N.
DOI:——
日期:——
Synthesis of aliphatic dimeric N-isopropylhydroxamic acids and the crystal and molecular structure of N,N'-dihydroxy-N,N'-diisopropylhexanediamide: a hydroxamic acid in the trans conformation
作者:William L. Smith、Kenneth N. Raymond
DOI:10.1021/ja00524a006
日期:1980.2
with C(O)-N and C=O distances similar to those found in amides. Strong intermolecular hydrogenbonds between the hydroxyl and carbonyl groups hold the molecules in pleated planes perpendicular to the b axis and compensate for the loss of the intramolecular hydrogen bond of the cis conformation. The intermolecular hydrogenbonds appear to be stronger than the intramolecular hydrogenbonds of the cis
由酰氯和 N-异丙基羟胺合成了一系列由 (CH/sub 2/)/sub n/ 单元(n = 4、6、8 和 10)分隔的二聚 N-异丙基异羟肟酸。己二酰衍生物 (n = 4) 的结构已由计数器方法收集的单晶 X 射线衍射数据确定。与所有先前已在结构上表征的异羟肟酸相比,平面异羟肟酸基团是反式的,其 C(O)-N 和 C=O 距离类似于酰胺中的距离。羟基和羰基之间的强分子间氢键使分子保持在垂直于 b 轴的折叠平面中,并补偿顺式构象的分子内氢键的损失。分子间氢键似乎比顺式构象的分子内氢键更强,但后者在溶液中熵有利。分子位于空间群 Pbca 的反演中心,a = 9.3859(3), b = 18.7156(2), and c = 4180(2)A。F/sub 0//sup 2/ > 3sigma(F/sub 0//sup 2/) 和所有原子(包括氢)各向异性的 1217 个独立数据的全矩阵最小二乘法细化导致
Barclay, Susan J.; Huynh, Boi Hanh; Raymond, Kenneth N., Inorganic Chemistry, 1984, vol. 23, # 14, p. 2011 - 2018
作者:Barclay, Susan J.、Huynh, Boi Hanh、Raymond, Kenneth N.