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Dinuclear silver(I) complexes of 24-membered bibracchial tetraimine Schiff base macrocycles derived from 2,5-diformylthiophene

1996; Elsevier BV; Volume: 250; Issue: 1-2 Linguagem: Inglês

10.1016/s0020-1693(96)05220-6

1873-3255

Harry Adams, Neil A. Bailey, Philìppe Bertrand, Simon R. Collinson, David E. Fenton, Simon J. Kitchen,

Metal-Organic Frameworks: Synthesis and Applications

Abstract The synthesis of dinuclear copper(I) complexes of bibracchial tetraimine Schiff base macrocycles derived from the cyclocondensation of 2,5-diformylthiophene and the amines N,N-bis-(2-aminoethyl)-2-phenylethylamine, N,N-bis-(2-aminoethyl)-n-butylamine and N,N-bis-(2-aminoethyl)-t-butylamine is described. The structures of three such complexes are reported. The complex [Cu2L3(CH3CN)2](PF6)2·CH3CN crystallises in the monoclinic space group P21/c and has unit-cell dimensions a=15.897(4), b=13.329(4), c=21.999(5) A, β=90.85(2)°, Z=4; the Cu–Cu separation is 5.201 A. The complex [Cu2L4(CH3CN)2](PF6)2·0.64CH3CN crystallises in the monoclinic space group P21/n and has unit-cell dimensions a=17.243(5), b=11.451(6), c=26.534(8) A, β=100.08(2)°, Z=4; the Cu–Cu separation is 5.386 A. The complex [Cu2L6(CH3CN)2](PF6)2·CH3CN crystallises in the triclinic space group P1 and has unit-cell dimensions a=13.122(3), b=13.2116(3), c=13.718(3) A, α=104.92(3)°, β=91.96(3)°, γ=96.19(3)°, Z=2; the Cu–Cu separation is 5.215 A. In each complex there is a strongly bonded acetonitrile molecule coordinated to each copper atom. The reaction of [Cu2L3(CH3CN)2](PF6)2 with carbon monoxide is discussed.