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Metal hydroborates and hydroborato metalates, 21 . Solvates of lithium (dimethylamino)trihydroborate
Author(s) -
Nöth Heinrich,
Thomas Steffen,
Schmidt Martin
Publication year - 1996
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19961290414
Subject(s) - chemistry , dimer , deprotonation , crystallography , molecule , metal , lithium atom , lithium (medication) , oxygen atom , crystal structure , nitrogen , atom (system on chip) , oxygen , hydrogen bond , inorganic chemistry , organic chemistry , ion , medicine , computer science , embedded system , ionization , endocrinology
Li(Me 2 NBH 3 ) ( 1 ) was prepared by deprotonation of Me 2 NH BH 3 with LiBu and its solubility determined in various solvents. Compound 1 is unstable in most ethereal solvents and decomposes in a reversible reaction into LiH and Li‐(Me 2 NBH 2 NMe 2 BH 3 ) ( 2 ). Five solvates of 1 were characterised by X‐ray structure analysis. Li(Me 2 NH 3 ) · TMEDA is a dimer in the solid state, and two units are connected to one another by BH…Li bonds. The crystal structure of Li(Me 2 NBH 3 ) · 0.5 dioxane is represented by layers consisting of tetrameric Li(Me 2 NBH 3 ) units connected via dioxane molecules. Each Li atom is coordinated to one oxygen atom, one nitrogen atom, and two hydrogen atoms. Also Li(Me 2 NBH 3 ) · 0.5 O 2 C 3 H 6 forms an extended layer, however with pentacoordinated Li atoms which bear one oxygen, one nitrogen, and three hydrogen atoms. A similar layer structure was also found for Li(Me 2 NBH 3 ) · O 3 C 3 H 6 where each Li atom is bound to two oxygen atoms of different trioxane molecules, one nitrogen atom, and two hydrogen atoms. Finally, Li(Me 2 NBH 3 ) · 12‐crown‐4 retains its molecular integrity in the solid state. Its Li atom is pentacoordinated by four oxygen atoms and one nitrogen atom.