The crystal structure of dichloro(diethyl pyridine-2,6-dicarboxylato)-cobalt(II), a chlorine-bridged dimer
Abstract
Crystals of the 1 : 1 complex between cobalt(II) chloride and diethyl pyridine-2,6-dicarboxylate are triclinic, with a= 9.33(1), b= 10.26(1), c= 8.16(1)Å, α= 104.23(1), β= 105.36(1), and γ= 92.94(1)°, space group P, Z = 2. The atomic positions have been determined by Patterson and Fourier methods from diffractometer X-ray intensitv data and refined by full-matrix least-sauares to R 4.17% for 2 325 reflexions. The compound lies on a crystallographic centre and has a dimeric structure with distorted octahedral co-ordination about each metal atom. The two cobalt atoms are linked by a double chlorine bridge with Co–Cl distances of 2.311(1) and 2.553(1)Å while the distance to the third, non-bridging, chlorine atom is 2.348(1)Å. Slight distortion of the ligand occurs on co-ordination but with the exception of the ethoxy-group it is nearly planar.