Acetimine and 2-Methyl-2-amino-4-iminopentane Complexes of Palladium(II)

By reaction between the labile complex cis- [Pd(C 6 F 5 ) 2 (PhCN) 2 ] and aqueous ammonia-acetone solutions the palladium complexes [Pd(C 6 F 5 ) 2 L 2 ] [L = NH 3 ( 1 ), NHCMe 2 ( 2 ) and L 2 = NHC(Me)CH 2 C(Me 2 )NH 2 ( 3 )] are obtained. The reaction product depends on the experimental conditions used. The cationic complexes [Pd(dmba)L 2 ]ClO 4 [L = NH 3 ( 5 ), NHCMe 2 ( 6 ) and L 2 = NH C(Me)CH 2 C(Me 2 )NH 2 ( 7 )] with the N,C-chelating 2-(dimethylaminomethyl)phenyl (dmba) ligand have been obtained by treating [(dmba)Pd(μ-Cl) 2 Pd(dmba)] with AgClO 4 in aqueous ammonia−acetone solution. The mono(acetimine) complex [Pd(dmba)(PPh 3 )(NHCMe 2 )]ClO 4 ( 8 ) is obtained by a similar procedure starting from [Pd(dmba)(PPh 3 )Cl]. The crystal structures of 1 − 3 and 6 and 7 have been determined; there is extensive hydrogen bonding (N−H···F−C or N−H···OClO 3 ) in all the compounds.