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Syntheses and Structures of two 1‐D Complexes, [Co(dmf) 2 (NCNCN) 2 ] and [Cu(bipy)(NCNCN)]ClO 4 with Bridging Dicyanamide Ligands
Author(s) -
Dong Wen,
Liang Mao,
Sun YaQiu,
Liu ZhanQuan
Publication year - 2003
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200300284
Subject(s) - dicyanamide , monoclinic crystal system , octahedron , crystallography , chemistry , ion , copper , crystal structure , bridging ligand , oxygen atom , ligand (biochemistry) , stereochemistry , molecule , catalysis , receptor , biochemistry , ionic liquid , organic chemistry
Two novel dicyanamide complexes [Co(dmf) 2 (NCNCN) 2 ] ( 1 ) and [Cu(bipy)(NCNCN)]ClO 4 ( 2 ) have been synthesized and structurally characterized. 1 crystallizes in the monoclinic space group C 2 with a = 13.568(6)Å, b = 7.403(3)Å, c = 8.118(3)Å and Z = 2, whereas 2 crystallizes in the monoclinic system, Cc group, a = 14.270(7)Å, b = 9.143(5)Å, c = 12.371(1) Å, β = 118.612(7)°, and Z = 4. According to X‐ray crystallographic studies, in complex 1 each Co II ion is six‐coordinated with four nitrogen atoms from four μ 1, 5 ‐dca (dca = dicyanamide) ligands and two oxygen atoms from two dmf ligands to form distorted octahedra. 1 forms a 1‐D network bridged via μ 1, 5 ‐dca. 2 consists of a uniform Cu(NCNCN)Cu chain, each Cu II ion is octahedrally coordinated with four nitrogen atoms from two μ 1, 5 ‐dca ligands and one bipy ligand and two oxygen atoms from two ClO 4 — ions. The octahedral Cu II ion shows a significant Jahn‐Teller distortion, with two axial oxygen atoms considerably farther from the copper than the four equatorial nitrogens.