SHORT-BITE CHIRAL DIPHOSPHAZANES DERIVED FROM (S)-ALPHA-METHYL BENZYLAMINE AND THEIR PD, PT AND RH METAL-COMPLEXES

New chiral diphosphazane ligands of the type Ph(2)PN(S-CHMePh)PYY' {Y Y'= Ph(2) (2), O2C6H4 (3); Y= Ph, Y'= Cl {4a (SS), 4b (SR)}, N(2)C(3)H Me(2)-3,5 {5a (SR), 5b (SS)} are synthesised starting from a chiral am inophosphine, Ph(2)PNH(S-CHMePh) (1). The structure of one of the dia stereomer 5a has been confirmed by single crystal X-ray diffraction {O rthorhombic system, P2(1)2(1)2(1); a=10.456 (4), b=15.362 (7), c=17.37 9 (6) Angstrom, Z=4}. Transition metal mononuclear complexes [Rh{eta(2 )-(Ph(2)P)(2)N- (S-CHMePh)}(2)](+)(BF4)(-) (6), [PdCl2{eta(2)-(Ph(2)P )(2)N(S-CHMePh)}] (7) and [PtCl2{eta(2)-(Ph(2)P)(2)N- (S-*CHMePh)}] ( 8) have also been synthesised. The structure of the palladium complex 7 is solved by X-ray crystallography {Orthorhombic system, P2(1)2(1)2( 1); a=8.746 (2), b=18.086 (2), c=20.811 (3) Angstrom, Z=4}. All these compounds are characterised by micro analyses, IR and NMR spectroscopi c data.