A case of four-coordinate silver(i) adopting a high energy planar geometry. Experiment and theory
作者:Shubhamoy Chowdhury、Michael G. B. Drew、Dipankar Datta
DOI:10.1039/b211898j
日期:2003.4.29
The ligands PhL and MeL are obtained by condensing 2-formylpyridine with benzil dihydrazone and diacetyl dihydrazone, respectively, in 2∶1 molar proportion. With silver(I), PhL yields a double-stranded dinuclear cationic helicate 1 in which the metal is tetrahedral but MeL gives a cationic one-dimensional polymeric complex 2 where silver(I) is distorted square planar and the ligand backbone is nearly
配体PhL和MeL是通过将2-甲酰基吡啶与苄基二di和二乙酰基二hydr分别以2∶1的摩尔比进行缩合而获得的。用银(I),PhL产生双链双核阳离子螺旋体1,其中金属是四面体,但是MeL产生阳离子一维聚合物络合物2,其中银(I)扭曲为正方形平面且配体主链几乎为平面。在两种络合物中,金属:配体比率为1∶1。在HF / 6-31 + G *水平上对配体的从头算计算表明,虽然PhL强烈偏爱螺旋构象,但MeL具有自然的倾角,可以保留在平面构象中。模型银的密度泛函理论计算(I)络合物表明,在MeL情况下,线性聚合物的形成也是施加Ag(I)in 2的平面几何形状的重要因素。
Synthesis and Characterization of Pyridine End-Capped Oligoazines
作者:E Kesslen
DOI:10.1016/00404-0399(50)0888j-
日期:1995.7.3
Batsanov, Andrei S.; Churakov, Andrei V.; Easson, Morag A. M., Journal of the Chemical Society, Dalton Transactions, 1999, # 3, p. 323 - 329
作者:Batsanov, Andrei S.、Churakov, Andrei V.、Easson, Morag A. M.、Govenlock, Linda J.、Howard, Judith A. K.、Moloney, Janet M.、Parker, David
DOI:——
日期:——
Raman and infrared spectroscopic studies of novel poly-aza chains
作者:R. Bariz、C. Bremard、J. Laureyns、J.C. Merlin
DOI:10.1016/0022-2860(86)85151-1
日期:1986.3
Abstract The preliminary results concerning the synthesis, the structural ans spectroscopicstudies of a new series of linear poly-aza-molecules are reported in the present work. All the Raman spectra are characterized by a remarkable simplicity of the spectral features and exhibit a high degree of semilitude with the spectra of polyene compounds.
Structure of 2,3-butanedione dihydrazone and IR study of higher polyazines: a new class of polymeric conductors
作者:Charles R. Hauer、Gregory S. King、Erica L. McCool、William B. Euler、Joseph D. Ferrara、Wiley J. Youngs
DOI:10.1021/ja00253a031
日期:1987.9
H/sub 2/N single bond (N double bond C(CH/sub 3/) single bond C(CH/sub 3/) double bond N)/sub x/ single bond NH/sub 2/, of various chain lengths have been prepared and studied by IR spectroscopy. An x-ray crystal structure was done on the monomer of this series, 2,3-butanedione dihydrazone (x = 1). It crystallized in space group P4/sub 2//n with cell constants a = 12.172 (3) A and c = 4.115 (1) A
多嗪,H/sub 2/N 单键 (N 双键 C(CH/sub 3/) 单键 C(CH/sub 3/) 双键 N)/sub x/ 单键 NH/sub 2/,各种已经制备并通过红外光谱研究了链长。对该系列的单体 2,3-丁二酮二腙 (x = 1) 进行了 X 射线晶体结构分析。它在空间群 P4/sub 2//n 中结晶,晶胞常数 a = 12.172 (3) A and c = 4.115 (1) A and Z = 4;从 3.0/sup 0/ 小于或等于 2theta 小于或等于 65.0/sup 0/ 收集强度数据。单体是平面的,在 E 构象中有长碳氮双键 (1.291 (1) A),甲基是反跨短碳碳单键 (1.474 (2) A),孤对跨氮-氮单键是gauche。异常的键长表示 ..pi.. 的程度。- 该分子中的键共轭。较高分子量的材料为黄色至棕色粉末,对空气稳定,具有高熔点,并且具有惊人的抗水解性。单体的