Department of Chemistry, Stanford University, Stanford, CA 94305.
Proc Natl Acad Sci U S A. 1984 Apr;81(8):2592-6. doi: 10.1073/pnas.81.8.2592.
The synthesis and characterization of molybdenum(II) porphyrin dimers containing unbridged metal-metal quadruple bonds are presented. Variable temperature 300 MHz (1)H NMR studies of meso-substituted derivatives provide novel solution evidence for both the existence of quadruple bonds and for a barrier to rotation about the metal-metal bonds in these complexes. The activation energy for this rotational process is 10.1 +/- 0.5 kcal.mol(-1).
本文介绍了含有无桥联金属-金属四重键的钼 (II) 卟啉二聚体的合成与表征。中取代衍生物的变温 300 MHz (1)H NMR 研究为这些配合物中四重键的存在以及金属-金属键旋转的势垒提供了新颖的溶液证据。该旋转过程的活化能为 10.1 ± 0.5 kcal·mol(-1)。
