含蒎烯基联吡啶的新型手性Mo(0)络合物的合成和表征  

Synthesis and Characterization of Novel Chiral Mo(0) Complexeswith Chiral Pineno-bipyridine Ligands

作　　者：章慧[1] 朱彩飞[1] 黄永清[1] 邹威[1] 李丽[1] 陈坚固[1] 高景星[1] 

机构地区：[1]厦门大学化学系固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2004年第1期71-76,共6页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(20171037;20073034);福建省自然科学基金(2002F016;C0020001)资助

摘　　要：为了探讨含手性蒎烯基联吡啶的手性钼(0)络合物的结构对光谱(特别是CD光谱)性质的影响,合成了两个新型手性钼络合物(+)CD452[Mo(CO)4(LRR)]和[Mo(CO)4(LSS)].用元素分析、IR、UV vis、CD、1HNMR和13CNMR等对其进行了充分表征.研究结果表明:两种络合物为一对具有几乎完全相同物理化学性质、配体互为对映体的光学异构体;两者在可见区的CD曲线呈现弱Cotton效应,且大致为镜象对称,说明在相应的手性络合物中,由于联吡啶上相反手性的蒎烯基通过中心金属钼对MLCT发色团产生了手性微扰作用,从而产生诱导CD效应.A pair of novel chiral complexes (+)^(CD)_(452)[Mo(CO)_4(L^(RR))] and (-)^(CD)_(452)[Mo(CO)_4(L^(SS))] were prepared and characterized by EA, UV-vis, IR, NMR and CD spectra in order to investigate the influence of structures on the spectral (especially CD) properties of chiral molybgenum(0) complexes with chiral pineno-bipyridines. The results reveal that the two chiral complexes have almost the same physico-chemical properties and they are a pair of optical isomers with the enantiomeric ligands. Their CD spectra in the visible range show weak Cotton effects, which are approximately of mirror image, indicating that the appended pineno-groups with opposite chirality in bipyridines can perturb the MLCT chromophores in the related complexes through the molybgenum centers respectively and lead to induced CD effects.

关 键 词：手性联吡啶 钼(O)络合物 合成 表征 CD光谱 

分 类 号：O614.612[理学—无机化学]