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两个金属-二氰胺-异烟酰胺配位超分子的合成与结构表征(英文)

Synthesis and Crystal Structures of Two M~Ⅱ-dicyanamide-isonicotinamide Supramolecular Complexes
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摘要 以二氰胺钠[Na(dca)]和异烟酰胺(L)为共配体分别与铜盐和镉盐反应合成了2种新的配合物:一维的[Cu(L)2(dca)2]·2MeOH(1)和二维的[Cd(L)2(dca)2](2)。通过元素分析和红外光谱进行了表征。X射线晶体结构分析表明配合物1属于三斜晶系,P1空间群,a=0.68007(6)nm,b=0.73759(6)nm,c=1.15405(10)nm,α=99.9550(10)°,β=90.3070(10)°,γ=103.2940(10)°,V=0.55428(8)nm3,Z=2。2属于单斜晶系,P21/c空间群,a=1.04377(7)nm,b=0.95630(6)nm,c=1.05593(7)nm,β=119.3330(10)°,V=0.91885(10)nm3,Z=4.1是一个中性的配位链,CuⅡ之间通过双μ1,5-dca桥而连接,L是单齿配位的。这些配位链通过链间的N-H…N氢键作用扩展为二维的层,甲醇分子位于层间,甲醇分子与酰胺基团之间的N-H…O,O-H…O氢键作用进一步将二维的层拓展为三维的网络。在2中,每个镉离子通过μ1,5-dca连接相邻的4个镉离子,从而形成了二维的(4,4)网,层与层之间通过酰胺基团之间的氢键作用扩展为三维的网络。 Reaction of sodium dicyanamide (Na(dca)) and isonicotinamide (L) with Cu(NO3)2·3H2O or Cd(NO3)2·6H2O, generating two complexes, 1D [Cu(L)2(dca)2] ·2MeOH (1) and 2D [Cd(L)2(dca)2] (2), which were characterized by elemental analysis and IR. X-ray crystal structure analysis displays that 1 crystallizes in the triclinic system, space group P1 with a=0.680 07(6) nm, b=0.737 59(6) nm, c=1.154 05(10) nm, α=99.955 0(10)°, β=90.307 0(10)°, γ=103.294 0(10)°, V=0.554 28(8) nm3, Z=2. 2 is in the monoclinic system, space group P21/c with a=1.043 77(7) nm, b=0.956 30(6) nm, c=1.055 93(7) nm, β=119.333 0(10)°, V=0.918 85(10) nm3, Z=4. 1 is a neutral 1D coordination chain, in which the CuⅡ centers are interlinked through double μ1,5-dca bridges and L acts as monodentate terminal ligand. These coordination chains are further expanded into a 2D layer through N-H…N hydrogen bonds. The N-H…O, O-H…O interactions from CH3OH molecules and L generate a 3D supramolecular architecture. While in 2, each cadmium ion coordinates to four dca anions in a μ1,5 mode to link neighboring four metal ions to generate a 2D (4,4) sheet. The N-H…O and N-H…N hydrogen-bonding interactions between L expand these layers into a 3D supramolecular network. CCDC: 742680, 1; 742679, 2.
作者 郑凌玲
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2010年第2期279-284,共6页 Chinese Journal of Inorganic Chemistry
基金 重庆大学人才引进科研启动(No.0903005104728)资助
关键词 异烟酰胺 二氰胺 铜(Ⅱ) 锰(Ⅱ) isonicotinamide dicyanamide copper(Ⅱ) cadmium(Ⅱ)
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