Cyclams with varied degree of protonation in the assemblies with cyano complexes of Mo and W

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• 作者：Beata Nowicka ; Mateusz Reczy¨½ski ; Wojciech Nitek ; Barbara Sieklucka
• 关键词：Octacyanotungstate ; Octacyanomolybdate ; Cyclam ; Bipyridinehexacyanotungstate
• 刊名：Polyhedron
• 出版年：2012
• 出版时间：26 October, 2012
• 年：2012
• 卷：47
• 期：1
• 页码：73-78
• 全文大小：641 K

文摘

Five ionic assemblies of octacoordinated cyano complexes of molybdenum and tungsten with protonated cyclam (1,4,8,11-tetraazacyclotetradecane) and tmc (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) have been obtained: (cyclamH₄)[Mo^IV(CN)₈]¡¤1.5H₂O (1), (cyclamH₂)(cyclamH₄)[W^V(CN)₈]₂¡¤4H₂O (2), (cyclamH₄)[W^V(CN)₈]Cl¡¤4H₂O (3), (tmcH₄)(tmcH₂)[W^V(CN)₈]₂¡¤4H₂O (4) and (cyclamH₄)[W^IV(CN)₆(bpy)]₂¡¤12H₂O (5) (bpy = 2,2¡ä-bipyridine). The presence of 3d metal cations as a template led to partly protonated cyclams in 2 and 4, where for the first time cyclam and tmc cations of different degree of protonation are encountered within one structure. Compounds 2, 3 and 5 crystallise in triclinic system space group , while 4 crystallises in monoclinic system space group P21/c. Compound 1 shows the highest symmetry of the lattice: orthorombic system space group I41/a. Thermogravimetric analyses of 1, 3 and 4 show the presence of stable anhydrous phase below 140 ¡ãC.