Rational Assembly of Soluble Copper(II) Phosphonates: Synthesis, Structure and Magnetism of Molecular Tetranuclear Copper(II) Phosphonates

被引:36
作者
Chandrasekhar, Vadapalli [1 ]
Senapati, Tapas [1 ]
Dey, Atanu [1 ]
Carolina Sanudo, E. [2 ,3 ]
机构
[1] Indian Inst Technol, Dept Chem, Kanpur 208016, Uttar Pradesh, India
[2] Univ Barcelona, Dept Quim Inorgan, E-08028 Barcelona, Spain
[3] Univ Barcelona, Inst Nanosci & Nanotechnol, E-08028 Barcelona, Spain
关键词
STATE COORDINATION CHEMISTRY; METAL-ASSISTED HYDROLYSIS; CRYSTAL-STRUCTURE; 2,4,6-TRIISOPROPYLPHENYLPHOSPONIC ACID; ASYMMETRIC HYDROGENATION; CADMIUM PHOSPHONATE; BASE COMPLEXES; CAGE; NETWORKS; PYRAZOLE;
D O I
10.1021/ic101982c
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reactions of the dinuclear copper complexes [Cu-2(L)(OAc)] [H3L = N,N'-(2-hydroxypropane-1,3-diyl)bis-(salicylaldimine) or [Cu-2(L')(OAc)] (H3L' = N,N'-(2-hydroxypropane-1,3-diyl)bis(4,5-dimethylsalicylaldimine)] with various phosphonic acids, RPO3H2 (R = t-Bu, Ph, c-C5H9, c-C6H11 or 2,4,6-i-Pr-3-C6H2), leads to the replacement of the acetate bridge affording tetranuclear copper(II) phosphonates, [Cu-4(L)(2)(t-BuPO3)](CH3OH)(2)(C6H6) (1), [Cu-4(L)(2)-(PhPO3)(H2O)(2)(NMe2CHO)](H2O)(2) (2), [Cu-4(L')(2)(C5H9PO3)](CH3OH)(2) (3), [Cu-4(L')(2)(C6H11PO3)](MeOH)(4)(H2O)(2) (4) and [Cu-4(L')(2)(C30H46P2O5)](PhCH3) (5). The molecular structures of 1-4 reveal that a [RPO3](2-) ligand is involved in holding the four copper atoms together by a 4.211 coordination mode. In 5, an in situ formed [(RPO2)(2)O](4-) ligand bridges two pairs of the dinuclear subunits. Magnetic studies on these complexes reveal that the phosphonate ligand is an effective conduit for magnetic interaction among the four copper centers present; a predominantly antiferromagnetic interaction is observed at low temperatures.
引用
收藏
页码:1420 / 1428
页数:9
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