Reactions of 1,3,2-Diselenaphospholanes with Lewis Acids: Borane and (Pentamethylcyclopentadienyl)rhodium and -iridium Dichloride

Reactions of 1,3,2-Diselenaphospholanes with Lewis Acids: Borane and (Pentamethylcyclopentadienyl)rhodium and -iridium Dichloride
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1,3,2-二硒磷杂环己烷与路易斯酸的反应:硼烷和(五甲基环戊二烯基)铑和二氯化铱

DOI:
10.1002/ejic.201402486
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发表时间:
2014
影响因子:
2.3
通讯作者:
W. Milius
W. Milius
中科院分区:
化学3区
文献类型:
--
作者:
B. Wrackmeyer;E.V. Klimkina;W. Milius

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2-R-1,3,2-二硒磷杂环戊烷(R=IPR,Ph)与1,2-二碳基环十二烷(12)单元用Lewis酸(如BH3在四氢呋喃中,BH3-SMe2)以及CP*-Rh和-Ir(CP*=五甲基环戊二烯)处理。在所有情况下,在开始的加合物形成之后,通过将硼烷或CP*MCl2插入其中一个P-Se键而进行扩环,伴随着氢化物或氯代配体转移到磷。最后,将P-R单元从环上置换出来,得到交换产物,其中的硼或金属已经成为五元环的一部分。用核磁共振波谱(1H、11B、13C、31P和77Se)监测反应。所提出的反应序列与计算的各种产物的优化气相结构的相对能量[B3LYP/6-311+G(d,p),LANL2DZ(Rh,Ir)理论水平]是一致的。通过X-射线分析确定了M=Ir,R=IPr的新的插入产物的分子结构。
2‐R‐1,3,2‐Diselenaphospholanes (R =iPr, Ph) with an annelated 1,2‐dicarba‐closo‐dodecaborane(12) unit were treated with Lewis acids such as borane reagents (BH3in THF, and BH3–SMe2) as well as Cp*‐rhodium and ‐iridium dichloride (Cp* = pentamethylcyclopentadienyl). In all cases, the adduct formation in the beginning was followed by ring expansion through insertion of the borane or Cp*MCl2into one of the P–Se bonds accompanied by transfer of a hydrido or chlorido ligand to phosphorus. Finally, the P–R unit was displaced from the ring to give the exchange products, in which the boron or the metal had become part of the five‐membered rings. The reactions were monitored by NMR spectroscopy (1H,11B,13C,31P, and77Se). The proposed reaction sequences were found to be in agreement with calculated [B3LYP/6‐311+G(d,p), LANL2DZ (Rh, Ir) level of theory] relative energies of optimized gas‐phase structures of the various products. The novel molecular structure of the preferred insertion product with M = Ir, R =iPr was determined by X‐ray analysis.
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期刊:
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