X-ray crystal structure of tetraaquabis (xanthosinato)nickel(II) hexahydrate

The complex [Ni(XsH(-1))(2)(H2O)(4)]. 6H(2)O (XsH(-1): xanthosinate) was is olated from the reaction of nickel carbonate with xanthosine in aqueous sol ution. The octahedral coordination is supported by the reflectance measurem ents. Single-crystal X-ray diffraction studies show that the crystals belon g to the triclinic P1 space group, with a = 7.152(1), b = 8.830(1), c = 13. 783(1) Angstrom, alpha = 82.024(1)degrees, beta = 86.155(1)degrees, gamma = 70.900(1)degrees, and D = 1.643 mg/m(3), for Z = 1. Nickel is six coordina te with four water molecules, and two N7 atoms from xanthosinato ligands. A complicated hydrogen-bonding network is present, all possible donors takin g part in it.