ツァイゼ salt
The ツァイゼ salt (Zeise's salt) is K[PtCl3(C2H4)]. It is organometallic containing platinum with a chemical formula called H2O. The color is yellow, and this anion becomes the complex having a ligand of η2-ethylene by stability for air. This material is usually composed under the stannous chloride catalyst by K2[PtCl4] and ethylene.
Molecular weight 368.61, melting point 220 degrees Celsius. The CAS registration number 16,405-35-9 (one water salt…In other words, ツァイゼ salt), 12,012-50-9 (anhydride) of the narrow sense, 123,334-22-5 (xH2O), 12,275-00-2 (anion).
Table of contents
History
The ツァイゼ salt is one of the organometallic reported for a long time [1]. William Christopher ツァイゼ which was a professor of the Copenhagen University reacted platinum (IV) chloride and boiling ethanol in the 1820s and composed it and announced that it was a compound containing ethylene. ユストゥス phone リービッヒ which was an influential figure of the chemistry world at the time often criticized an opinion of ツァイゼ, but Birnbaum composed a compound containing ethylene in 1868 and was proved if was right [2]; [3].
The ツァイゼ salt attracted the chemist's attention from specificity of the molecular structure in the late 19th century. However, the structure did not completely become clear until a technique of the X-ray diffraction developed in the 20th century [4].
A study is pushed forward eagerly in a field of the organic metal chemistry, and the ツァイゼ salt will bring about new concepts such as the number of ハプト.
Related compounds
- I can get dimeric [{(η2-C2H4)PtCl2}2] of the ツァイゼ salt by dimerizing after detachment of potassium chloride.
- "Cyclo octadiene -2 platinum" composed by platinum (II) chloride and 1,5-cyclo octadiene chloride is a compound of platinum and alkene used well.
Besides, a lot of compounds containing ethylene are composed. For example, platinum is 0 values in three coordination in ethylene - screw - triphenyl phosphine - platinum [(C6H5)3P]2Pt(H2C=CH2).
Structure
In ツァイゼ salt and the related compounds, alkene turns around metal - alkene combination in moderate activation energy. π combination between most metal and alkene is weaker than σ combination in the analysis of the high energy barrier. Because all four protons are equivalent with the anion of the ツァイゼ salt, I cannot measure a rotary wall in Kobo for a nuclear magnetic resonance. However, I can measure, for example, the value of metal - ethylene-binding rotary wall with the symmetric low ethylene compound such as CpRh(C2H4)2 [5].
Source
- ^ Zeise, W. C. " Von der Wirkung zwischen PIatinchlorid und Alkohol, und von den dabei entstehenden neuen Substanzen, " Annalen der Physik und Chemie 1831, Volume 97, pages 497-541.
- ^ R. A. Love, T. F. Koetzle, G. J. B. Williams, L. C. Andrews, R. Bau (1975). " Neutron diffraction study of the structure of Zeise's salt, KPtCl3•C2H4•H2O ". Inorganic Chemistry 14 (11): 2653 - 2657. doi: 10.1021/ic50153a012.
- ^ L. B. Hunt (1984). "The First Organometallic Compounds: WILLIAM CHRISTOPHER ZEISE AND HIS PLATINUM COMPLEXES". Platinum Metals Review 28 (2): 76-83.
- ^ M. Black, R. H. B. Mais and P. G. Owston (1969). " The crystal and molecular structure of Zeise's salt, KPtCl3•C2H4•H2O ". It is doi: Acta Crystallographica Section B B25: 1753-1759 10.1107/S0567740869004699.
- ^ Elschenbroich, C. "Organometallics: A Concise Introduction "(2006) Wiley-VCH: Weinheim. ISBN 978-3,527,293,902
This article is taken from the Japanese Wikipedia ツァイゼ salt
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