Metallaheteroborane chemistry: Part 16. Contrasting metal to heteroborane bonding modes in isoelectronic {MC<sub>2</sub>B<sub>9</sub>} and {MAs<sub>2</sub>B<sub>9</sub>} clusters. Synthesis and characterisation of [9-{Fe(CO)<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)}-nido-7,8-C<sub>2</sub>B<sub>9</sub>H<sub>12</sub>], [7-{Fe(CO)<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>H<sub>5</sub>)}-nido-7,8-As<sub>2</sub>B<sub>9</sub>H<sub>10</sub>] and [7-{M(CO)<sub>2</sub>(η<sup>7</sup>-C<sub>7</sub>H<sub>7</sub>)}-nido-7,8-As<sub>2</sub>B<sub>9</sub>H<sub>10</sub>], where M is Mo or W
作者:Jonathan Bould、John D. Kennedy、George Ferguson、F. Tony Deeney、Gerald M. O'Riordan、Trevor R. Spalding
DOI:10.1039/b306776a
日期:——
Structural details of previously reported [9-Fe(CO)2(η5-C5H5)}-nido-7,8-C2B9H12] 1 and [7-Fe(CO)2(η5-C5H5)}-nido-7,8-As2B9H10] 2, and of the new compounds [7-M(CO)2(η7-C7H7)}-nido-7,8-As2B9H10], where M is Mo 3 or W 4, were established by 1H and 11B NMR spectroscopy and, for 1, 2 and 3, by single-crystal X-ray diffraction methods. The NMR data showed that the C2B9} and As2B9} cages were of the
先前报道的结构细节[9- 的Fe(CO)2(η 5 -C 5 H ^ 5)} -巢-7,8--C 2乙9 ħ 12 ] 1和[7- 的Fe(CO)2( η 5 -C 5 H ^ 5)} -巢-7,8-如图2乙9 ħ 10 ] 2,并且新的化合物[7- M(CO)2(η 7 -C 7 ħ 7)} -尼多-7,8 -As 2 B 9 H10 ],其中M为Mo 3或W 4,通过建立1 H和11乙NMR光谱和,为1, 2和3,通过单晶X射线衍射方法。这核磁共振数据显示C 2 B 9 }和As 2 B 9 }笼是nido型的,每个笼的敞开面上有一个桥接氢原子。这X射线衍射的研究1证实,的Fe(CO)2(η 5 -C 5 H ^ 5)}单元附连外通过与B-H键的铁原子的一个不寻常的相互作用笼子。X射线衍射对2和3的研究表明,过渡元素原子与砷供体结合。Fe–H–B}区域中的尺寸为Fe(1)–B(9)2