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Synthesis and Structures of Magnesium Tetrahydridoaluminates
Author(s) -
Nöth Heinrich,
Schmidt Martin,
Treit Andreas
Publication year - 1995
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.19951281007
Subject(s) - chemistry , steric effects , dimer , hydride , crystallography , magnesium , ring (chemistry) , derivative (finance) , stereochemistry , hydrogen bond , medicinal chemistry , molecule , hydrogen , organic chemistry , financial economics , economics
The molecular structures of XMg(A1H 4 ) · 4 THF ( 1a, 2, 3a ) (X = A1H 4 , Cl, Br) have been determined by X‐ray structural analysis. Each compound possesses a hexacoordinated Mg center and AlH 4 − groups bound to this center via a single hydride bridge bond. Attempts to prepare ROMg(AlH 4 ) compounds were successful only for sterically demanding groups R (R = CMe 3 , CPh 3 , naph, mes, smes). The 2‐naphthoxy derivative 7 , a compound with the composition (naphO)Mg‐(AlH 4 ) · 2.5 THF, is a dimer with a central Mg 2 O 2 ring. One of its two AlH 4 − groups is terminally bound to one Mg atom, the other bridges the two Mg centers. This structure indicates how AlH 4 − transfer may occur from ROMg(AlH 4 ) compounds to form Mg(OR) 2 and Mg(AlH 4 ) 2 .