Syntheses and Molecular Structures of New Calix[4]arene Molybdenum and Tungsten Complexes
Syntheses and Molecular Structures of New Calix[4]arene Molybdenum and Tungsten Complexes
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新型杯[4]芳烃钼钨配合物的合成及分子结构
DOI:
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发表时间:
2001
期刊:
影响因子:
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通讯作者:
U. Radius
中科院分区:
文献类型:
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作者:
J. Attner;U. Radius
An unusual disproportionation reaction of the molybdenum(IV) and tungsten(IV) chlorides [MCl4L2] (M=Mo, L=Et2S, Et2O; M=W; L=Et2S) in the presence of p-tBu-calix[4]arene (Cax(OH)4) and triethylamine leads to d0 complexes [(CaxO4){CaxO2(OH)2}M] (1) and d3 compounds (HNEt3)2[(CaxO4)2M2] (2). Complexes 1 a (M=Mo), 1 b (M=W), and the HCl adduct of 2 a (M=Mo) have been structurally characterized. Compound 1 a represents one of the few examples of a well-characterized molybdenum(VI) hexa-alkoxide complex of the type [Mo(OR)6]. Isolation and structural characterization of the side product [(CaxO4W){κ2(O)-κ1(O)-CaxO3(OH)}(CaxO4WCl)] (3) suggests the intermediacy of chloro-containing calix[4]arene complexes in these reaction mixtures. The reaction of 1 a with HCl provides [CaxO4MoCl2] (4 a), the first well-defined example of a mixed molybdenum(VI) alkoxide halide compound of the general formula [MoClx(OR)6−x].