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Bis‐NHC Aluminium and Gallium Dihydride Cations [(NHC) 2 EH 2 ] + (E = Al, Ga)
Author(s) -
Hock Andreas,
Werner Luis,
Riethmann Melanie,
Radius Udo
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000720
Subject(s) - chemistry , adduct , cationic polymerization , gallium , iodide , medicinal chemistry , isopropyl , nuclear magnetic resonance spectroscopy , stereochemistry , inorganic chemistry , polymer chemistry , organic chemistry
The NHC alane and gallane adducts (NHC) · AlH 2 I (NHC = Me 2 Im Me 7 , i Pr 2 Im 8 , i Pr 2 Im Me 9 ) and (NHC) · GaH 2 I (NHC = Me 2 Im Me 10 , i Pr 2 Im Me 11 , Dipp 2 Im 12 ; R 2 Im = 1,3‐di‐organyl‐imidazolin‐2‐ylidene; Dipp = 2,6‐diisopropylphenyl; i Pr = isopropyl; Me 2 Im Me = 1,3,4,5‐tetra‐methyl‐imidazolin‐2‐ylidene) were prepared either by the simple yet efficient reaction of the NHC adduct (NHC) · AlH 3 with elemental iodine or by the treatment of (NHC) · GaH 3 with an excess of methyl iodide at room temperature. The reaction of one equivalent of the group 13 NHC complexes with an additional equivalent of the corresponding NHC afforded cationic aluminium and gallium hydrides [(NHC) 2 · AlH 2 ] + I− (NHC = Me 2 Im Me 13 , i Pr 2 Im 14 , i Pr 2 Im Me 15 ) and [(NHC) 2 · GaH 2 ] + I− (NHC = Me 2 Im Me 16 , i Pr 2 Im Me 17 ) and the normal and abnormal NHC coordinated compound [(Dipp 2 Im) · GaH 2 ( a Dipp 2 Im)]+I− 18 . Compounds 7 – 18 were isolated and characterized by means of elemental analysis, IR and multinuclear NMR spectroscopy and by X‐ray diffraction of the compounds 7 , 9 , 10 , 15 , 16 and 18 .