Hydrogen elimination in bulky calcium amidoborane complexes: isolation of a calcium borylamide complex.

Hydrogen elimination in bulky calcium amidoborane complexes: isolation of a calcium borylamide complex.
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DOI:
10.1021/ja901073c
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发表时间:
2009-03
影响因子:
15
通讯作者:
Jan Spielmann;S. Harder
Jan Spielmann;S. Harder
中科院分区:
化学1区
文献类型:
--
作者:
Jan Spielmann;S. Harder

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N-取代氨基硼烷钙配合物的分解途径取决于取代基的空间体积。相对较小的取代基(R = H,Me,iPr)脱氢生成具有桥连RN-BH-N(R)-BH(3)(2-)离子的二聚体配合物,而较大的2,6-二异丙基苯基取代基导致形成具有硼酰胺阴离子的配合物:H(2)B(R)N(-)。该产物是用H(2)(催化)再生的有前景的物种,即,氢化为氨基硼烷阴离子H(3)B(R)NH(-)。
The decomposition route of N-substituted calcium amidoborane complexes depends on the steric bulk of the substituent. Relatively small substituents (R = H, Me, iPr) gave dehydrogenation to dimeric complexes with a bridging RN-BH-N(R)-BH(3)(2-) ion, whereas the larger 2,6-di-isopropylphenyl substituent resulted in formation of a complex with a borylamide anion: H(2)B(R)N(-). This product is a promising species for (catalytic) regeneration with H(2), i.e., hydrogenation to the amidoborane anion H(3)B(R)NH(-).