Bis(2-Amino-5-bromopyrimidinium) Tetrahalometallates: Crystal structures of (2-amino-5-bromopyrimidinium)2 MCl₄ (M = Co, Zn)

Abstract

The reactions of metal(II) chlorides and bromides with 2-amino-5-bromopyrimidine (2-abpm) in neutral and acidic solution were investigated. The reaction with ZnCl 2 , ZnBr 2 , CoCl 2 , CoBr 2 and MnCl 2 in acidic nitromethane solution gave complexes of the formula (2-abpmH) 2 Crystals of 1 and 3 suitable for single crystal X-ray diffraction were obtained. Crystal data: For (1): triclinic, P-1, a ¼ 6.2485 (13), b ¼ 9.0520(14), c ¼ 15.334(4) Å , ¼ 94.81(2), ¼ 95.224(17), ¼ 98.027(17) , V ¼ 851.1(3) Å 3 , Z ¼ 2, R ¼ 0.0596 for [|I| ! 2(I)]. For (3): triclinic, P-1, a ¼ 6.2438(13), b ¼ 9.0597(15), c ¼ 15.318(3) Å , ¼ 94.749(18), ¼ 95.343(15), ¼ 98.021(17) , V ¼ 850.2(3) Å 3 , Z ¼ 2, R ¼ 0.0452 for [|I| ! 2(I )]. Variable temperature magnetic susceptibility data indicates weak antiferromagnetic interactions in the cobalt and manganese complexes.