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Reactions of a diborylstannylene with CO2 and N2O: diboration of carbon dioxide by a main group bis(boryl) complex
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-4-27 , DOI: 10.1039/d1dt01216a
Andrey V Protchenko 1 , M Ángeles Fuentes 1 , Jamie Hicks 1 , Caitilín McManus 1 , Rémi Tirfoin 1 , Simon Aldridge 1
Dalton Transactions ( IF 3.5 ) Pub Date : 2021-4-27 , DOI: 10.1039/d1dt01216a
Andrey V Protchenko 1 , M Ángeles Fuentes 1 , Jamie Hicks 1 , Caitilín McManus 1 , Rémi Tirfoin 1 , Simon Aldridge 1
Affiliation
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The reactions of the boryl-substituted stannylene Sn{B(NDippCH)2}2 (1) with carbon dioxide have been investigated and shown to proceed via pathways involving insertion into the Sn–B bond(s). In the first instance this leads to formation of the (boryl)tin(II) borylcarboxylate complex Sn{B(NDippCH)2}{O2CB(NDippCH)2} (2), which has been structurally characterized and shown to feature a κ2 mode of coordination of the [(HCDippN)2BCO2]− ligand at the metal centre. 2 undergoes B–O reductive elimination in hexane solution (in the absence of further CO2) to give the boryl(borylcarboxylate)ester {(HCDippN)2B}O2C{B(NDippCH)2} (3) i.e. the product of formal diboration of carbon dioxide. Alternatively, 2 can assimilate a second equivalent of CO2 to give the homoleptic bis(borylcarboxylate) Sn{O2CB(NDippCH)2}2 (4), which can be prepared via an alternative route from SnBr2 and the potassium salt of [(HCDippN)2BCO2]−, and structurally characterized as its DMAP (N,N-dimethylaminopyridine) adduct. Structural and reactivity studies also point to the possibility for extrusion of CO from the [(HCDippN)2BCO2]− fragment to generate the boryloxy system [(HCDippN)2BO]−, a ligand which can be generated directly from 1 via reaction with N2O. The initially formed unsymmetrical species Sn{B(NDippCH)2}{OB(NDippCH)2} has been shown to be amenable to crystallographic study in the solid state, but to undergo ligand redistribution in solution to generate a mixture of 1 and the bis(boryloxy) complex Sn{OB(NDippCH)2}2.
中文翻译:
二硼烷基亚锡与CO2和N2O的反应:通过主基团双(硼基)配合物对二氧化碳进行二硼化
已经研究了硼基取代的亚锡烷基Sn {B(NDippCH)2 } 2(1)与二氧化碳的反应,并表明该反应是通过涉及插入Sn-B键的途径进行的。在第一种情况下,这导致形成(硼基)锡(II)硼烷基羧酸盐络合物Sn {B(NDippCH)2 } {O 2 CB(NDippCH)2 }(2),该结构已被表征并显示具有κ 2的[(HCDippN)的协调的模式2 BCO 2 ] -配体在金属中心。2个经受B-O系列还原在己烷溶液(在不存在进一步的CO消除2),得到甲硼烷基(borylcarboxylate)酯{(HCDippN)2 B}Ò 2 13 C {B(NDippCH)2 } ...(3)即,该产品二氧化碳的正式缩合。或者,2可以吸收第二当量的CO 2,得到均衡的双(硼烷基羧酸盐)Sn {O 2 CB(NDippCH)2 } 2(4),可以通过另一种方法由SnBr 2和钾的钾盐制得[(HCDippN)2 BCO2 ] -,并在结构上为其DMAP( N, N-二甲基氨基吡啶)加合物表征。结构和反应性研究还指出,有可能从[(HCDippN) 2 BCO 2 ] -片段中挤出CO生成硼氧基系统[(HCDippN) 2 BO] -,该配体可以通过反应直接从1 生成用N 2 O.最初形成的非对称的物种的Sn {B(NDippCH) 2 } {OB(NDippCH) 2}已显示出可以进行固态晶体学研究,但在溶液中进行配体重新分布,生成1和双(硼氧基)配合物Sn {OB(NDippCH)2 } 2的混合物。
更新日期:2021-05-11
中文翻译:

二硼烷基亚锡与CO2和N2O的反应:通过主基团双(硼基)配合物对二氧化碳进行二硼化
已经研究了硼基取代的亚锡烷基Sn {B(NDippCH)2 } 2(1)与二氧化碳的反应,并表明该反应是通过涉及插入Sn-B键的途径进行的。在第一种情况下,这导致形成(硼基)锡(II)硼烷基羧酸盐络合物Sn {B(NDippCH)2 } {O 2 CB(NDippCH)2 }(2),该结构已被表征并显示具有κ 2的[(HCDippN)的协调的模式2 BCO 2 ] -配体在金属中心。2个经受B-O系列还原在己烷溶液(在不存在进一步的CO消除2),得到甲硼烷基(borylcarboxylate)酯{(HCDippN)2 B}Ò 2 13 C {B(NDippCH)2 } ...(3)即,该产品二氧化碳的正式缩合。或者,2可以吸收第二当量的CO 2,得到均衡的双(硼烷基羧酸盐)Sn {O 2 CB(NDippCH)2 } 2(4),可以通过另一种方法由SnBr 2和钾的钾盐制得[(HCDippN)2 BCO2 ] -,并在结构上为其DMAP( N, N-二甲基氨基吡啶)加合物表征。结构和反应性研究还指出,有可能从[(HCDippN) 2 BCO 2 ] -片段中挤出CO生成硼氧基系统[(HCDippN) 2 BO] -,该配体可以通过反应直接从1 生成用N 2 O.最初形成的非对称的物种的Sn {B(NDippCH) 2 } {OB(NDippCH) 2}已显示出可以进行固态晶体学研究,但在溶液中进行配体重新分布,生成1和双(硼氧基)配合物Sn {OB(NDippCH)2 } 2的混合物。