在
CO 作用下,
以
甲苯 为溶剂,
以14%的产率得到tris[(η2-formaldehyde)zirconocene]
参考文献:
名称:
Fischer-Tropsch 中间体:来自氢化锆羰基化的三 [(.eta.2-甲醛) 锆茂]
摘要:
从苯中重复重结晶 (/sup 2/-甲醛) 锆茂复合物产生适用于 X 射线衍射分析的晶体。晶体结构是从 7264 衍射仪收集的反射中阐明的,并精制到最终的 R 值为 0.055。包括键长和键角的值。结果表明,这种早期过渡金属的配合物可以从 CO 与金属氢化物的反应中获得。1 图。
DOI:
10.1021/ja00348a075
作为产物:
描述:
甲烷 、 氢气 、 锆 以
neat (no solvent, solid phase) 、 neat (no solvent, gas phase) 为溶剂,
生成
参考文献:
名称:
Repulsive carbon–deuterium interactions in zirconium and titanium carbodeuterides
摘要:
Zirconium and mixed zirconium/titanium carbodeuteride samples of nominal compositions ZrC0.44D0.89, Ti0.66Zr0.33C0.57D0.92 and Ti0.66Zr0.33C0.53D0.29 have been investigated by powder X-ray and neutron diffraction and joint Rietveld structure refinements. They contain two types of phases, one crystallizing with a face-centred cubic (fcc) metal atom arrangement and the other with a hexagonal close-packed (hcp) metal atom arrangement having trigonal symmetry. While the pure Zr sample contains both a cubic and a trigonal phase, the mixed Zr/Ti samples contain either a cubic phase only (C/D-poor sample), or two trigonal phases having different Ti/Zr ratios (C/D-rich sample). The carbon atoms occupy octahedral interstices in nearly ordered (hcp) or disordered (fcc) arrangements, and the deuterium atoms occupy either tetrahedral (hcp) or octahedral (fcc) interstices. In the hcp phase metal octahedra around carbon atoms contract while metal tetrahedra around deuterium atoms expand. The structure results are consistent with the assumption of repulsive interactions between non-metal atoms resulting in their longest possible separation (D-D > 2.1 angstrom, C-D > 2.6 angstrom). (C) 2007 Elsevier B.V. All rights reserved.