Evidence for the formation of terminal hydrides by protonation of an asymmetric iron hydrogenase active site mimic
Evidence for the formation of terminal hydrides by protonation of an asymmetric iron hydrogenase active site mimic
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DOI：
10.1021/ic0703124
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发表时间：
2007-04-30
影响因子：
4.6
通讯作者：
Talarmin, Jean
中科院分区：
文献类型：
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作者：
Ezzaher, Salah;Capon, Jean-Francois;Talarmin, Jean
用dppe （Ph2PCH2CH2PPh2）在回流甲苯中处理[Fe-2(mu-pdt)(CO)(6)] [pdt = S(CH2)(3)S]得到不对称配合物[Fe-2(mu-pdt)(CO)(4)(dppe)](1)。1在CH2Cl2中与HBF4-Et2O质子化，在室温下得到多羟基衍生物[Fe-2(mu-pdt)(CO)(4)(dppe)(mu-H)](BF4)(2)。通过H-1， P-31和C-13核磁共振在低温下监测反应，明确表明1的质子化过程意味着末端氢化物中间体。
Treatment of [Fe-2(mu-pdt)(CO)(6)] [pdt = S(CH2)(3)S] with dppe (Ph2PCH2CH2PPh2) in refluxing toluene affords the asymmetric complex [Fe-2(mu-pdt)(CO)(4)(dppe)] (1). Protonation of 1 with HBF4-Et2O in CH2Cl2 gives at room temperature the mu-hydrido derivative [Fe-2(mu-pdt)(CO)(4)(dppe)(mu-H)](BF4) (2). Monitoring the reaction by H-1, P-31, and C-13 NMR at low temperature reveals unambiguously that the process of the protonation of 1 implies terminal hydride intermediates.