作者:María Carmona、Ricardo Rodríguez、Fernando J. Lahoz、Pilar García-Orduña、Iñaki Osante、Carlos Cativiela、José A. López、Daniel Carmona
DOI:10.1039/c6dt02411d
日期:——
mixtures of two epimers at the metal centre of the neutral complexes, [(η5-C5Me5)RhCl(κ2N,O-L)] (HL = HL1 (3), HL2 (4)), in which amino carboxylate adopts a κ2N,O mode of coordination along with variable amounts of the cationic compounds, [(η5-C5Me5)Rh(κ3N,O,S-L)]Cl (HL = HL1 (6Cl), HL2 (7Cl)), which contain κ3N,O,S coordinated cysteine-derived ligands. However, in a basic medium, the N-Boc substituted cysteine
由L-半胱氨酸盐酸盐甲酯制备修饰的半胱氨酸配体S-苄基-α-甲基-L-半胱氨酸(HL2)。商业广告的反应小号苄基大号半胱氨酸(HL1)或HL2与二聚体,[(η 5 -C 5我5)的RhCl} 2(μ-Cl)的2 ],产生了阳离子络合物,[ (η 5 -C 5我5)的RhCl(HL)] Cl(上HL = HL1(1),HL2(2)),其中,所述配位体的半胱氨酸呈现κ 2 Ñ,小号协调模式。在碱性介质中,HL1或HL2与发生反应[(η 5 -C 5我5)的RhCl} 2(μ-Cl)的2 ],得到两种差向异构体的混合物在中性络合物的金属中心,[(η 5 -C 5我5)的RhCl(κ 2 ñ,ö -大号)](HL = HL1(3),HL2(4)),其中氨基羧酸盐采用κ 2 Ñ,ö具有可变量的阳离子化合物的沿协调模式,[(η 5 -C 5我5)的Rh(κ 3 Ñ,ö,小号-大号)]氯(HL =