名称:
Organophosphorus ligands with XPNSO skeleton (X = O, S) and their Pd(II) complexes. Crystal and molecular structure of [{XP(OEt)2}(O2SR)]NH (X = O, R = Me, Ph; X = S, R = C6H4Cl-4) and Pd[{SP(OEt)2}(O2SC6H4Cl-4)N]2
摘要:
Several organophosphorus acids of type [{XP(OEt)(2))(O2SR)]NH [X= O, R= Me (1), Ph (2), C6H4CH3-4 (3); X = S, R = C6H4Cl-4 (4)] were obtained by a method based on the reaction between (EtO)(2)P(X)NHLi and the corresponding organosulfonyl chloride. They were subsequently deprotonated with KOBut. Salt metathesis reactions between PdCl2 and the corresponding potassium salts K[{XP(OEt)(2))(O2SR)N] [X = O, R = Me (5), Ph (6), C6H4CH3-4 (7); X = S. R = C6H4Cl-4 (8)] in a 1:2 molar ratio resulted in palladium(II) complexes of type Pd[{XP(OEt)(2))(O2SR)N](2) [X = O, R = Me (9), Ph (10), C6H4CH3-4 (11); X = S, R = C6H4Cl-4 (12)]. In a similar way was obtained the palladium(II) complex Pd[(SPPh2)(O2SPh)N](2) (13), using the appropriate reagents. All compounds were characterized by multinuclear NMR (H-1, C-13, P-31) and infrared spectroscopy. The potassium salts and the palladium complexes were investigated also by mass spectrometry. Single-crystal X-ray diffraction studies revealed a layered supramolecular assembly in case of acid 1, a monomeric structure for compound 4, while in case of compound 2 dimeric associations are formed in the solid state by NH center dot center dot center dot OP hydrogen bonding. A trans-S,N-coordination pattern of the organophosphorus ligand was found in the palladium complex 12. Moreover, short Cl center dot center dot center dot H contacts result in a polymeric [Pd[{SP(OEt)(2)}(O2SC6H4Cl-4)N](2)](n) chain. (C) 2013 Elsevier Ltd. All rights reserved.