Versatile coordination mode of dicyanamide in nickel(II) complexes containing polyamines as blocking ligands

被引：36

作者：

Boca, R ^{[1
]}

Boca, M

Gembicky, M

Jäger, L

Wagner, C

Fuess, H

机构：

[1] Slovak Univ Technol Bratislava, Dept Inorgan Chem, SK-81237 Bratislava, Slovakia

[2] Slovak Acad Sci, Inst Inorgan Chem, SK-81237 Bratislava, Slovakia

[3] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[4] Univ Halle Wittenberg, Dept Chem, D-06099 Halle An Der Saale, Germany

来源：

POLYHEDRON | 2004年 / 23卷 / 15期

关键词：

crystal structure; nickel(II) complexes; magnetism; pseudohalides;

D O I：

10.1016/j.poly.2004.06.022

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Triethylenetetramine (L-4) and dipropylenetriamine (L-3) were used as blocking ligands (tetradentate and tridentate, respectively) that, after complexation with Ni(II), leave two or three sites ready for ligation with N(CN)(2)(-) (dicyanamide, abbr. dca). The formed complexes are mononuclear, binuclear or polymeric. This was proven by the X-ray structure analysis for [NiL4(dca)(2)] (mononuclear, 1), [(dca)(LNi)-Ni-3(dca)(2)NiL3(dca)] (binuclear, 2) and [NiL4(dca)](ClO4) (polymeric, 3). The magnetic susceptibility measurements for 1 confirm that the Curie law is obeyed at higher temperatures whereas the zero-field splitting is effective below 10 K (D/hc = -4 cm(-1)); 2 shows a weak anti ferromagnetic coupling (J/hc = -0.6 cm(-1)); 3 exhibits a negligible exchange coupling (J/hc approximate to 0). (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：2337 / 2348

页数：12

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