In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis and crystal structures of the molybdenum(II) complexes with the N,N-dimethylthiocarbamoyl containing ligand: crystal structures of β-[Mo(CO)2{η2-S2P(OEt)2}(η2-SCNMe2)(PPh3)] and [Mo(CO)2(η3-Tp)(η2-SCNMe2)(PPh3)], published in 2012-08-31, which mentions a compound: 18583-60-3, mainly applied to molybdenum dimethylthiocarbamoyl complex preparation crystal structure, Category: piperazines.
Reactions of the thiocarbamoyl-molybdenum complex [Mo(CO)2(η2-SCNMe2)(PPh3)2Cl] 1, and ammonium diethyldithiophosphate, NH4S2P(OEt)2, and potassium tris(pyrazoyl-1-yl)borate, KTp, in dichloromethane at room temperature yielded two coordinated diethyldithiophosphate thiocarbamoyl-molybdenum complexes [Mo(CO)2{η2-S2P(OEt)2}(η2-SCNMe2)(PPh3)] β-3, and tris(pyrazoyl-1-yl)borate thiocarbamoyl-molybdenum complex [Mo(CO)2(η3-Tp)(η2-SCNMe2)(PPh3)] 4, resp. The geometry around the metal atom of compounds β-3 and 4 are capped octahedrons. The α- and β-isomers are defined to the dithio-ligand and one of the carbonyl ligands in the trans position in the former and two carbonyl ligands in the trans position in the latter. The thiocarbamoyl and diethyldithiophosphate or tris(pyrazoyl-1-yl)borate ligands coordinate to the molybdenum metal center through the carbon and sulfur and two sulfur atoms, or three nitrogen atoms, resp. Complexes β-3 and 4 were characterized by x-ray diffraction analyses.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics