A new class of binuclear gallium hydrides

• Verfasst von: Robinson, George [VerfasserIn]
• Verfasst von: Himmel, Hans-Jörg [VerfasserIn]
• Titel: A new class of binuclear gallium hydrides
• Titelzusatz: synthesis and properties of [{GaCl(hpp)H}2] (hpp=1,3,4,6,7,8-Hexahydro-2H-pyrimido[1,2-a]pyrimidate)
• Verf.angabe: George Robinson, Christina Y. Tang, Ralf Köppe, Andrew R. Cowley, and Hans-Jörg Himmel
• Umfang: 7 S.
• Fussnoten: Gesehen am 02.03.2018
• Titel Quelle: Enthalten in: Chemistry - a European journal
• Jahr Quelle: 2007
• Band/Heft Quelle: 13(2007), 9, S. 2648-2654
• ISSN Quelle: 1521-3765
• DOI: doi:10.1002/chem.200600807
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1570369402

Abstract

Herein we report on the synthesis and characterization of the first representative of a new class of gallium hydrides, namely [{GaCl(hpp)H}2] (hpp=1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidate). Our X-ray diffraction data suggest the presence of weak HH contacts between adjacent [{GaCl(hpp)H}2] molecules in the crystal. With the aid of quantum-chemical calculations, the pathway of its formation starting with the adduct H2ClGa⋅NMe3 and the pyrimidine hppH were analyzed. [{GaCl(hpp)H}2] slowly decomposes at 25 °C, a process which presumably leads under H2 elimination to [{GaCl(hpp)}2]. Although we were not yet able to characterize [{GaCl(hpp)}2] experimentally, DFT calculations provide information about its likely structure. According to these calculations, the molecule features a GaGa single bond.