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• W2020125198 abstract "Abstract The reactions of 2‐borane‐1,3,4,5‐tetramethylimidazoline (BH 3 · NHC Me ) with selected phosphane adducts of the Lewis acids B(C 6 F 5 ) 3 and Ga(C 6 F 5 ) 3 are studied. Among others, adducts (C 6 F 5 ) 3 Ga · PH 2 Cp* ( 1a ) and (C 6 F 5 ) 3 B · PH 2 Cp* ( 2 ) are used as starting materials. When the (C 6 F 5 ) 3 Ga–phosphane adducts 1a and (C 6 F 5 ) 3 Ga · PPhH 2 are treated with BH 3 · NHC Me , the Lewis acid/base stabilised phosphanylboranes (C 6 F 5 ) 3 Ga · P(Cp*)HBH 2 · NHC Me ( 3a ) and (C 6 F 5 ) 3 Ga · P(Ph)HBH 2 · NHC Me ( 3b ) are formed, respectively, by a hydrogen elimination reaction. In contrast, the reaction of BH 3 · NHC Me with the (C 6 F 5 ) 3 B–phosphane adducts (C 6 F 5 ) 3 B · PH 2 R [R = H, R = Cp* ( 2 ) and R = Ph] in CH 2 Cl 2 at room temperature leads to the formation of a salt with the general formula [(C 6 F 5 ) 3 BH][RPH 2 · BH 2 · NHC Me ] ( 4a : R = H, 4b : R = Cp*, 4c : R = Ph). To synthesise the Lewis acid/base stabilised phosphanylborane with (C 6 F 5 ) 3 B as a Lewis acid and 1,3,4,5‐tetramethylimidazolylidene (NHC Me ) as a Lewis base, a different synthetic pathway was applied: the replacement reaction of the Lewis base. At room temperature, NHC Me displaced the amine in (C 6 F 5 ) 3 B · P(Ph)HBH 2 · NMe 3 to yield (C 6 F 5 ) 3 B · P(Ph)HBH 2 · NHC Me ( 5 ). All compounds were comprehensively characterised by spectroscopic methods. Compounds 1a , 1b , 2 , 3a , 3b and 5 were additionally characterised by X‐ray crystallographic analysis. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)" @default.
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• W2020125198 date "2008-07-17" @default.
• W2020125198 modified "2023-10-14" @default.
• W2020125198 title "N‐Heterocyclic Carbenes in Lewis Acid/Base Stabilised Phosphanylboranes" @default.
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• W2020125198 doi "https://doi.org/10.1002/ejic.200800305" @default.
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