摘要
亚硝酰基配合物中存在着线型端基(三电子基)、弯曲型端基(单电子基)、桥式和面桥式不同的亚硝酰基配位方式,这些不同配位方式在催化研究领域中的应用具有无限广阔的前景。特殊的配位方式使中心原子出现16 e结构或20 e结构,在其它配合物中只有当配体解离或缔合时才拥有这样的电子结构,因而大部分亚硝酰基配合物均具有催化活性。其次配位亚硝酰基受中心原子活化使N≡O键容易断裂,亚硝酰基被还原生成羟胺或亚胺基;活化的亚硝酰基可以作为氧源催化转化汽车废气:2NO+2CO→N_2+2CO_2或2NO+CO→N_2O+CO_2以消除污染。我们曾在室温。
Nitrosyl complexes can be used as catalysts in pollution control or as a model to study biological nitrogen cycle. Reduction of facing bridge nitrosyl which is activated by the center metal to imido group, one main step of biological nitrogen cycle, can be achieved by protonation. In this report, a facing-bridging nitrosyl cluster[ (η5 -C5H6 ) ( μ2-CO ) Fe]3 ( μ3-NO ) was synthesized by reaction of cyclo-pentadienyl dicarbonyliron dimer with nitrogen monoxide in refluxing xylol. The cluster was characterized by IR,MS and 1H NMR with comparing with its analogies. The infrared absorption of the facing-bridging nitrosyl in the cluster is observed in the longer wave region, the nitrosyl group in the title complex is more active. The reduction reactivity of the nitrosyl group is being studied, the results will be reported in future.
出处
《分子催化》
EI
CAS
CSCD
1991年第1期99-101,共3页
Journal of Molecular Catalysis(China)
