NEW ORGANOTIN COMPOUNDS CONTAINING
4-(2,6-DIISOPROPYLPHENYLAMINO)-3-PENTENE-2-ONE AS LIGAND

Carmen Comsa and Cristian Silvestru

“Babes-Bolyai” University, Faculty of Chemistry & Chemical 
Engineering, 11 Arany Janos St., RO-400028 Cluj-Napoca, Romania;
E-mail:  carmencomsa@yahoo.com

The reaction of 2,4-pentadione with 2,6-diisopropylaniline gave 4-(2,6-diisopropyl-phenylamino)-3-pentene-2-one, (2,6-Pri2-C6H3)NC(Me)CH2C(Me)O (1) (abbreviated HL), as a brown solid. Its lithium salt, LiL (2), obtaind using butyllithium, was reacted with various organotin(IV) chlorides in the molar ratio 1:1 or 1:2 to give Me2Sn(L)Cl (3), Me2Sn(L)2 (4), Me3Sn(L) (5), Bu2Sn(L)Cl (6), Ph2Sn(L)Cl (7), (PhCH2)2Sn(L)Cl (8). The solution behavior of these compounds was investigated by NMR (1H, 13C) spectroscopy. Pentacoordinated structures, with nonequivalent organic groups on the tin atom, were proposed for R2Sn(L)Cl derivatives on the basis of NMR data.

1H NMR spectrum of Me2Sn(L)Cl (3)