Effect of single-wall carbon nanotubes on direct epoxidation of cyclohexene catalyzed by new derivatives of cis-dioxomolybdenum(VI) complexes with bis-bidentate Schiff-base containing aromatic nitrogen–nitrogen linkers
作者:Masoud Salavati-Niasari、Mehdi Bazarganipour
DOI:10.1016/j.molcata.2007.09.009
日期:2007.12
characterisation of three dimeric cis-dioxomolybdenum(VI) complexes involving Schiff-base ligands is described. Ligands were obtained by condensation of salicylaldehyde with aromatic nitrogen–nitrogen linkers (4,4′-diaminodiphenylmethane; 4,4′-diaminodiphenylether; 4,4′-diaminodiphenylsulfone). [MoO2(acac)2] reacted with the prepared ligands; bis[(N,O-salicylidene)-4,4′-diaminodiphenyl]methane, H2L1; bis[(N
描述了涉及席夫碱配体的三种二聚体顺式-二氧代钼(VI)配合物的合成和表征。水杨醛与芳族氮-氮连接基(4,4'-二氨基二苯甲烷; 4,4'-二氨基二苯醚; 4,4'-二氨基二苯砜)缩合可得到配体。[MoO 2(acac)2 ]与制备的配体反应;双[(N,O-水杨基亚烷基)-4,4′-二氨基二苯基]甲烷,H 2 L 1;H 2 L 1。双[(N,O-水杨基亚烷基)-4,4-二氨基二苯基]醚,H 2 L 2;H 2 L 2。双[[ N,O-水杨基)-4,4'-二氨基二苯基]砜,H 2 L 3;形成六配位的顺式-dioxoMo(VI)配合物;[MoO 2 L 1-3 ] 2。黄色的,非电解的和抗磁性的化合物通过元素分析和光谱技术(IR,1 H NMR和UV-vis)表征。这些络合物在环己烯与叔丁基氢过氧化物(TBHP)的环氧化中显示出良好的催化活性和选择性,特别是对于络合物[MoO 2 L 3 ]