Diorganotin(IV) complexes of N-mono-, di- and tri-chloroacetyl, N′,N″-bis(isopropyl) phosphoric triamide

Abstract Three new carbacylamidophosphates with formula CH n Cl 3− n C(O)NHP(O)(NHCH(CH 3 ) 2 ) 2 ( n  = 2 ( 1 ); n  = 1 ( 2 ); n  = 0 ( 3 )) and their organotin compounds with formula (1)SnCl 2 Me 2 (μ- 1 )SnCl 2 Me 2 ( 4 ), SnCl 2 Me 2 ( 2 ) 2 ·C 6 H 5 CH 3 ( 5 ) and [SnCl 2 Me 2 ( 3 )] n ( 6 ) were synthesized and characterized by elemental, IR and NMR spectra analyses. The spectroscopic properties of complexes were compared with those corresponding ligands. The crystal structures of complexes were determined by X-ray crystallography, which reveals that complex 4 is binuclear structure with two non-equivalent Sn atoms. One adopts a distorted trans (C,C) cis (O P ,O P ) cis (Cl,Cl) octahedral configuration, while the other adopts a distorted trigonal bipyramidal geometry composed of two methyl groups, two chlorine atoms and carbonyl group. Molecule 5 is centrosymmetric with two O P , disordered chlorine and methyl groups in trans positions. Toluene molecules are located in the interlayer spaces of 5 . In compound 6 , bonding via both PO and CO functionalities forms 1D infinite chain structures along b axis. The Sn–O P bond length in 6 is significantly longer than the same distance in 4 and 5 , while the O P and Sn–Cl bonds are shorter. The bond lengths in these complexes were compared with those of N -benzoyl carbacylamidophosphates.