Coordination chemistry of Co complexes containing tridentate SNS ligands and their application as catalysts for the oxidation of n-octane
作者:Lynette Soobramoney、Muhammad D. Bala、Holger B. Friedrich
DOI:10.1039/c4dt01750a
日期:——
oxygenates under mild catalytic conditions has remained a centuries long challenge in chemical catalysis. In an attempt to address this challenge, two series of tridentate donor ligands 2,6-bis(RSCH2)pyridine and bis(RSCH2CH2)amine [R = alkyl, aryl]} and their respective cobalt complexes Co[2,6-bis(RSCH2)pyridine]Cl2 and Co[bis(RSCH2CH2)amine]Cl2} were synthesized and characterized. Crystal structures of Co[2
在温和的催化条件下,将饱和烃选择性氧化为末端含氧化合物在化学催化中仍是一个世纪以来的长期挑战。为了解决这一挑战,我们设计了两个三齿供体配体2,6-双(RSCH 2)吡啶和双(RSCH 2 CH 2)胺[R =烷基,芳基]}和它们各自的钴配合物Co [合成并表征了2,6-双(RSCH 2)吡啶] Cl 2和Co [双(RSCH 2 CH 2)胺] Cl 2 }。Co [2,6-双(RSCH 2)吡啶] Cl 2 [R = –CH 3(1),–CH 2的晶体结构CH 3(2), - CH 2 CH 2 CH 2 CH 3(3)和-C 6 H ^ 5(4)报告],其中1结晶为同型双金属二聚体,在八面体几何并入的两个桥接氯原子围绕每个钴中心,而2,3和4中结晶为特征的围绕每个钴中心配位体的三角双锥排列单金属物质。作为n均相选择氧化的催化剂-辛烷,催化剂产生的酮为主要产物,选择性为。对于活性最高的催化剂Co