Synthesis, Crystal, and Molecular Structure of bis(Thiosemicarbazide)Nickel(II) 1,5-Naphthalene Disulfonate Dihydrate Complex [Ni(Tsc)2](1,5-Nds) · 2H2O

Abstract

Complex [Ni(Tsc)₂](1.5-Nds) · 2H₂O (I), where Tsc = thiosemicarbazide, NH₂NHC(=S)NH₂; 1,5-Nds^2– is double deprotonated anion of 1,5-naphthalene disulfonic acid \(\rm{CH_{10}H_6(SO_3)_2^{2-}}\) was synthesized, characterized by IR spectroscopy, and studied by thermogravimetry and X-ray diffraction. Crystal I is built of complex cations [Ni(Tsc)₂]²⁺, anions (Nds)^2–, and crystallization water molecules. The Ni atom is coordinated along the vertices of the trans-square by two sulfur atoms and two nitrogen atoms of two bidentate chelating ligands Tsc. The structural units of crystal I are joined by a branched network of N–H···O and O–H···O hydrogen bonds with the participation of donors, namely, the hydrogen atoms of two NH₂ groups and the NH group of complex cation [Cu(Tsc)]²⁺ and the H atoms of water molecules, and acceptors, namely, oxygen atoms of the sulfate group of anion 1,5-Nds^2– and solvate water molecules.