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Chromium(I) hydride (systematically named chromium hydride) is an inorganic compound with the empirical chemical formula CrH. It occurs naturally in some kinds of stars where it has been detected by its spectrum. It has not yet been obtained in bulk, hence its bulk properties remain unknown. However, molecular chromium(I) hydride with the formula CrH has been isolated in solid gas matrices. The molecular hydride is very reactive. As such the compound is not well characterised, although many of its properties have been calculated via computational chemistry. == Molecular forms == A. G. Gaydon first created CrH gas with an electric arc between chromium electrodes in a hydrogen air flame. CrH can be formed by the reaction of chromium metal vapour, created by an electrical discharge in the presence of hydrogen. The electric discharge breaks up the H2 molecules into reactive H atoms. So the reaction then proceeds as Cr(g) + H → CrH. Another method to make CrH is to react chromium carbonyl (Cr(CO)6) vapour with atomic hydrogen generated by an electric discharge. Chromium hydride can also be formed by reacting chromium with methane in an electric arc. This also produces a variety of carbon and hydrogen containing chromium molecules such as CrCH3 and CrCCH.〔 Also it is possible to trap CrH into a solid argon noble gas matrix. The solid argon does not react with CrH and allows studying reactive molecules that need to be kept apart from other molecules. The researchers that produced the trapped CrH molecules also believe that they made and trapped CrH2 molecules, based on its spectrum. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chromium(I) hydride」の詳細全文を読む スポンサード リンク
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