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- W2095420925 abstract "Contributions to the Chemistry of Boron 220[1]. — Investigations on Diborylmethanes A convenient synthesis and spectroscopic properties of various organyl-halogen-substituted diborylmethanes (RXB)2CH2 (2a — e, R = Me, Et, Pr, Ph, Mes) are described. Reaction of bis(dichloroboryl)methane (1 b) with tBuLi in a 1:2 ratio leads to isomerization of the tert-butyl group, whereas bis(dimethoxyboryl)methane (1a) reacts with 5 equivalents of tBuLi to yield tri-tert-butylborane and lithium di-tert-butylethyleneborate (9). Borate 9 is characterized NMR-spectroscopically and by derivatization with Me3SiCl. Bis[alkinyl(dialkylamino)-boryl]methanes 10a—c are obtained from the bis[chloro(dialkylamino)boryl]methanes 5a, b and LiCCPh or LiCCMe, respectively. 10c is characterized by an X-ray crystal structure analysis which allows, for the first time, a direct comparison of an sp- and an sp3-carbon atom bound to the same boron atom. Finally, an almost linear relationship between dL13C of the methylene group and dL11B in diborylmethanes has been detected." @default.
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- W2095420925 date "1993-09-01" @default.
- W2095420925 modified "2023-09-23" @default.
- W2095420925 title "Beiträge zur Chemie des Bors, 220. Untersuchungen über Diborylmethane" @default.
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- W2095420925 doi "https://doi.org/10.1002/cber.19931260906" @default.
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