SYNTHESIS AND STRUCTURE OF (2-AMINO-5-BROMOPYRIMIDINE)BROMOCOPPER(I)

Abstract

The reaction of CuBr2 with 2-amino-5-bromopyrimidine and HBr in aqueous solution gave as the major product (2-amino-5-bromopyrimidine)bromocopper(I) (1) in 58% isolated yield. Compound 1 crystallizes as small orange blocks in the rare space group 14mm. Crystal data for 1 are: tetragonal. space group: 14mm, a = b= 15.646(3), c = 6.705(3) Å, V = 1641.3(8) Å3 Z = 8. Dcale = 2.634 Mg/m3, μ = 12.334 mm−1, F(OOO) =1216, MoKa (λ. = 0.71073 A˚). R = 0.0322 for [|I| ⩾2σ(I)] and R = 0.0420 for all 343 unique reflections and 70 parameters. The structure exists as a firee-dimensional coordination polymer with sheets of pyrimidine bridged copper atoms, parallel to the ab-crystal plane, bridged by bromine atoms roughly parallel to the c-axis.