ligands; both effects, geometrical (facial vs meridional) and electronic (neutral vs anionic), can be unveiled and rationalized. Finally, the reactivity of the Ru-OH(2) complexes has been tested with regard to the epoxidation of trans-stilbene, and it has been shown that, in this particular case, the reactivity is practically not dependent on the redox potentials of the catalyst but, in sharp contrast, it
合成具有子午线或面部三齿
配体且通式为[Ru(II)(T)(D)(X)](n +)[T = 2,2':6',2'的新Ru配合物家族'-叔
吡啶或三唑烷基
甲烷; D = 4,4'-二苄基-4,4',5,5'-四氢-2,2'-
生物恶唑(S,S-box-C)或2-[(((1'S)-1'-(羟甲基) )-2'-苯基)乙基羧酰胺]-(4S)-4-苄基-4,5-二氢o唑(S,S-box-O); X = Cl,H(2)O,MeCN或
吡啶]已被描述。通过(1)H NMR和UV-vis技术在溶液中对所有配合物进行了光谱表征。此外,这里提出的所有
氯配合物也已经通过单晶X射线衍射分析以固态表征。
恶唑啉酸S,S-box-C
配体经历Ru辅助的
水解反应,生成相应的酰胺化物阴离子
恶唑啉
配体S,S-box-O,它们也牢固地附着在
金属中心上,并在Ru
金属中心上产生很强的σ捐赠作用。还已经通过循环伏安法研究了所有配合物的氧化还原