An unusual coordination polymer containing Cu+ ions and featuring possible Cu center dot center dot center dot Cu 'cuprophilic' interactions: poly[di-mu-chlorido-(mu(4)-3,5-diaminobenzoato-kappa O-4:O ':N:N ')tricopper(I)(3 Cu-Cu)]

作者：Khosa Muhammad Kaleem; Wood Paul T; Humphrey Simon M; Harrison William T A^*

来源：Acta Crystallographica Section C-Structural Chemistry, 2016, 72(1): 63-+.

DOI：10.1107/S205322961502330X

• copper(I)
• three-dimensional coordination polymer
• cuprophilic interaction
• crystal structure
• 3,5-diaminobenzoate
• in situ reduction

Compounds containing copper(I) are of interest for their role in biological processes. The nature of short (< similar to 3.2 angstrom) Cu center dot center dot center dot Cu contacts within these compounds has been debated, being either described as weakly attractive (bonding) 'cuprophilic' interactions, or simply as short metal-metal distances constrained by ligand geometry or largely ionic in nature. The title three-dimensional Cu+-containing coordination polymer, [Cu-3(C7H7N2O2)Cl-2](n), was formed from the in situ reduction of CuCl2 in the presence of 3,5-diaminobenzoic acid and KOH under hydrothermal conditions. Its complex crystal structure contains ten distinct Cu-I atoms, two of which lie on crystallographic inversion centres. The copper coordination geometries include near-linear CuOCl and CuN2, T-shaped CuOCl2 and distorted tetrahedral CuOCl3 groups. Each Cu-I atom is also associated with two adjacent metal atoms, with Cu center dot center dot center dot Cu distances varying from 2.7350 (14) to 3.2142 (13) angstrom; if all these are regarded as 'cuprophilic' interactions, then infinite [<(1)over bar>01] zigzag chains of Cu-I atoms occur in the crystal. The structure is consolidated by N-H center dot center dot center dot Cl hydrogen bonds.

• 出版日期2016-1