Preparation and characterization of dinuclear Pd(ii) complexes of binucleating tetraaza-thiophenolate ligands
作者:Gabriel Siedle、Berthold Kersting
DOI:10.1039/b516071e
日期:——
The thioethers 4-tert-butyl-2,6-bis((2-(dimethylamino)ethylimino)methyl)phenyl(tert-butyl)sulfane (tBu–L3) and 4-tert-butyl-2,6-bis((2-(dimethylamino)ethylimino)methyl)phenyl(tert-butyl)sulfane (tBu–L4) react with PdCl2(NCMe)2 to give the dinuclear palladium thiophenolate complexes [(L3)Pd2Cl2]+ (2) and [(L4)Pd2(µ-Cl)]2+ (3) (HL3 = 2,6-bis((2-(dimethylamino)ethylimino)methyl)-4-tert-butylbenzenethiol, HL4 = 2,6-bis((2-(dimethylamino)ethylamino)methyl)-4-tert-butylbenzenethiol). The chloride ligands in 2 could be replaced by neutral (NCMe) and anionic ligands (NCS−, N3−, CN−, OAc−) to give the diamagnetic PdII complexes [(L3)Pd2(NCMe)2]3+ (4), [(L3)Pd2(NCS)2]+ (5), [(L3)Pd2(N3)2]+ (6), [(L3)Pd2(µ-CN)}2]4+ (7) and [(L3)Pd2(OAc)]2+ (9). The nitrile ligands in 4 and in [(L3)Pd2(NCCH2Cl)2]3+ are readily hydrated to give the corresponding amidato complexes [(L3)Pd2(CH3CONH)]2+ (8) and [(L3)Pd2(CH2ClCONH)]2+ (10). The reaction of [(L3)Pd2(NCMe)2]3+ with NaBPh4 gave the diphenyl complex [(L3)Pd2(Ph)2]+ (11). All complexes were either isolated as perchlorate or tetraphenylborate salts and studied by IR, 1H and 13C NMR spectroscopy. In addition, complexes 2[ClO4], 3[ClO4]2, 5[BPh4], 6[BPh4], 7[ClO4]4, 9[ClO4]2, 10[ClO4]2 and 11[BPh4] have been characterized by X-ray crystallography.
硫醚 4-叔丁基-2,6-双((2-(二甲基氨基)乙基亚氨基)甲基)苯基(叔丁基)硫烷 (tBu–L3) 和 4-叔丁基-2,6-双(( 2-(二甲氨基)乙基亚氨基)甲基)苯基(叔丁基)硫烷(tBu–L4)与PdCl2(NCMe)2反应得到双核苯硫酚钯配合物[(L3)Pd2Cl2]+ (2)和[(L4) Pd2(μ-Cl)]2+ (3) (HL3 = 2,6-双((2-(二甲氨基)乙基亚氨基)甲基)-4-叔丁基苯硫醇,HL4 = 2,6-双((2-( (二甲氨基)乙氨基)甲基)-4-叔丁基苯硫醇)。 2 中的氯配体可以被中性 (NCMe) 和阴离子配体 (NCS−, N3−, CN−, OAc−) 取代,得到抗磁性 PdII 配合物 [(L3)Pd2(NCMe)2]3+ (4) , [(L3)Pd2(NCS)2]+ (5), [(L3)Pd2(N3)2]+ (6), [(L3)Pd2(μ-CN)}2]4+ (7)和[(L3)Pd2(OAc)]2+ (9)。 4 和 [(L3)Pd2(NCCH2Cl)2]3+ 中的腈配体很容易水合,得到相应的酰胺基配合物 [(L3)Pd2(CH3CONH)]2+ (8) 和 [(L3)Pd2(CH2ClCONH) )]2+ (10)。 [(L3)Pd2(NCMe)2]3+ 与 NaBPh4 反应得到二苯基络合物 [(L3)Pd2(Ph)2]+ (11)。所有配合物均以高氯酸盐或四苯硼酸盐形式分离,并通过 IR、1H 和 13C NMR 光谱进行研究。此外,还对配合物 2[ClO4]、3[ClO4]2、5[BPh4]、6[BPh4]、7[ClO4]4、9[ClO4]2、10[ClO4]2 和 11[BPh4] 进行了表征通过X射线晶体学。