名称:
Pyrimidine, pyridazine, quinazoline, phthalazine, and triazine coordination polymers of copper(I) halides
摘要:
The coordination of diazine and triazine bridging ligands (B = pyrimidine (Pym), quinazoline (Qnz), pyridazine (Pdz), phthalazine (Ptz), and 1,3,5-triazine (Trz)) with CuX and CuXL (X = Cl, Br, 1; L = PPh3, P(OPh)(3)) has been investigated. Products without phosphorus(III) ligands include [CuXB] (B = Qnz, Pdz, Ptz), [(CuX)(2)B] (B = Pym, Qnz, Pdz, Ptz, Trz), [(CuX)(3)B-2] (B = Ptz, Trz), and [(CuX)(3)B] (B = Trz). Only CuX-Trz and CuI-Pdz afford more than one product stoichiometry. Products with phosphorus ligands are of the types [(CuXL)B] (B = Pdz, Ptz), [(CuXL)(2)B] (B = Pym, Qnz, Pdz, Ptz, Trz), and [(CuXL)(3)B] (B = Trz). Thermogravimetic analyses of the complexes typically show step-wise losses of B and L, ultimately yielding CuX. The X-ray crystal structure of [CuBr(Qnz)] features copper atoms bridged by Br and Qnz, forming 2D sheets of fused rectangular Cu4Br2(QnZ)(2) units. The X-ray structures of [(CuBr(PPh3))(2)B] (B = Pym, Trz) show I D chains formed from rhomboidal (CuL)(2)Br-2 units linked by the B ligand. The structure of [CuCl(PPh3)(Pdz)] is shown by X-ray to be a simple halide-bridged dimer. The X-ray structure of [(CuCl(P(OPh)(3)))(3)(Trz)] is a hexamer, having an oblate spheroid core. The core is composed of a Cu6Cl6 macrocycle capped with two Trz ligands. (C) 2002 Elsevier Science Ltd. All rights reserved.