New organotin(IV) complexes of nicotinamide, isonicotinamide and some of their novel phosphoric triamide derivatives: Syntheses, spectroscopic study and crystal structures

作者：Gholivand Khodayar^*; Oroujzadeh Nasrin; Afshar Farzaneh

来源：Journal of Organometallic Chemistry, 2010, 695(9): 1383-1391.

DOI：10.1016/j.jorganchem.2010.02.004

• Organotin(IV)
• Phosphoramidate
• Nicotinamide
• Isonicotinamide
• NMR spectroscopy
• X-ray crystallography

Three novel phosphoramidate ligands with formula RP(O)R(2)', R = Nicotinamide(nia), R' = NHC(CH(3))(3)(L(1)), NH(C(6)H(11))(L(2)); R = isonicotinamide(iso), NH(C(6)H(11)) (L(3)) and their new organotin(IV) complexes with formula SnCl(2)(CH(3))(2)(X)(2), X = L(1) (C(1)), L(2) (C(2)), L(3) (C(3)) plus SnCl(2)(CH(3))(2)(L(4))(2)(C(4)), L(4) = isoP(O)[NHC(CH(3))(3)](2), were synthesized and characterized by (1)H, (13)C, (31)P, (119)Sn NMR, IR, UV-Vis spectroscopy and elemental analysis. Two novel complexes of nia and iso with formula SnCl(2)(CH(3))(2)(X)(2), X = nia (C(5)), iso (C(6)) were also prepared and all the complexes were spectroscopically studied in comparison to their related ligands and to each other. The crystal structure of complexes C(1), C(3), C(4), and C(5) were determined by X-ray crystallography. -Sn-Cl center dot center dot center dot H-N-major hydrogen bonds beside other electrostatic interactions produced a three dimensional polymeric cluster in the crystalline lattice of C(1), C(3), C(5) and a two dimensional polymeric chain in C(4). Results showed that coordination of the phosphoramidate ligand (L(4)) to Sn in C(4) has been occurred from the nitrogen site of the pyridine ring similar to C(5), C(6) in which there is no P=O donor site; however, in C(1) and C(3) the active donor site of corresponding ligands is P=O. It seems that in these complexes there is a competition between P=O and N(pyridine) donor sites and the influential factor which determines the winner site is the type of substituents on phosphorus atom.

• 出版日期2010-5-1