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Diborane(6) and Its Analogues Stabilized by Mono-, Bi-, and Trinuclear Group 7 Templates: Combined Experimental and Theoretical Studies.
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-01-14 , DOI: 10.1021/acs.inorgchem.9b03217
Rini Prakash 1 , Alaka Nanda Pradhan 1 , Madhuri Jash 1 , Samia Kahlal 2 , Marie Cordier 2 , Thierry Roisnel 2 , Jean-François Halet 2 , Sundargopal Ghosh 1
Affiliation  

Irradiation of [Re2(CO)10] in the presence of BH3·thf resulted in the formation of several rhenium diborane(6) species, for example, [{(OC)4Re}{Re(CO)3}2(μ3-η2:η2:η2-B2H6)(μ-H)], 1; [{(OC)4Re}2{Re(CO)3}(μ3-η2:η2:η1-B2H6)(μ-H)], 2; and [{(OC)4Re}2(μ-η2:η2-B2H6)], 3, comprising diverse coordination modes of the [B2H6]2- ligand. Compound 1 contains a tris(bidentate) [B2H6]2- unit, whereas 2 consists of an unsymmetrically bound [μ3-η2:η2:η1-B2H6]2- ligand. In contrast, the irradiation of [Mn2(CO)10] with BH3·thf yielded only the Mn analogue of 1, [{(OC)4Mn}{Mn(CO)3}2(μ3-η2:η2:η2-B2H6)(μ-H)], 1'. In an attempt to generate the bimetallic Mn-diborane(6), we have carried out the reaction of 1' with PCy3 under photolytic conditions. The reaction led to the formation of two single base stabilized unsymmetrical diborane(5) species, [{Mn(CO)3}{Mn(CO)2PCy3}(μ-η2:η2-B2H5·PCy3)(μ-H)], 4, and [{Mn(CO)2PCy3}(η3-B2H5·PCy3)], 5. As [B2H6]2- and [B2H5·PCy3]- are isoelectronic, the bondings in 4 and 5 are analogous to that of diborane(6) species 1-3. All the new species have been characterized spectroscopically, and their structures were further confirmed by single-crystal X-ray diffraction studies. DFT-type quantum chemical calculations were carried out that provided insight into the bonding interaction of [B2H6]2- and [B2H5·PCy3]- with the M(CO)n fragments.

中文翻译:

单,双和三核第7组模板稳定的Diborane(6)及其类似物:实验和理论研究相结合。

在BH3·thf存在下辐照[Re2(CO)10]导致形成几种di硼烷(6)物种,例如[{(OC)4Re} {Re(CO)3} 2(μ3- η2:η2:η2-B2H6)(μ-H)],1; [{((OC)4Re} 2 {Re(CO)3}(μ3-η2:η2:η1-B2H6)(μ-H)],2; [3]和[{(OC)4 Re} 2(μ-η2:η2 -B 2 H 6)],包括[B 2 H 6] 2-配体的多种配位模式。化合物1包含一个三(双齿)[B2H6] 2-单元,而化合物2由一个不对称结合的[μ3-η2:η2:η1-B2H6] 2-配体组成。相反,用BH3·thf照射[Mn2(CO)10]仅产生Mn类似物1,[{(OC)4Mn} {Mn(CO)3} 2(μ3-η2:η2:η2-B2H6 )(μ-H)],1'。为了产生双金属Mn-diborane(6),我们在光解条件下进行了1'与PCy3的反应。反应导致形成两个单碱稳定的不对称乙硼烷(5)物种,[{Mn(CO)3} {Mn(CO)2PCy3}(μ-η2:η2-B2H5·PCy3)(μ-H)],4和[{Mn(CO)2PCy3}(η3-B2H5·PCy3 )]。5.由于[B2H6] 2-和[B2H5·PCy3]-是等电子的,因此4和5中的键类似于乙硼烷(6)物种1-3的键。所有新物种均已通过光谱表征,其结构已通过单晶X射线衍射研究进一步证实。进行了DFT型量子化学计算,从而洞察了[B2H6] 2-和[B2H5·PCy3]-与M(CO)n片段的键合相互作用。并且通过单晶X射线衍射研究进一步证实了它们的结构。进行了DFT型量子化学计算,从而洞察了[B2H6] 2-和[B2H5·PCy3]-与M(CO)n片段的键合相互作用。并且通过单晶X射线衍射研究进一步证实了它们的结构。进行了DFT型量子化学计算,从而洞察了[B2H6] 2-和[B2H5·PCy3]-与M(CO)n片段的键合相互作用。
更新日期:2020-01-15
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