ISSN:
0009-2940
Schlagwort(e):
Strontium bis(tetrahydridoborate)-2 tetrahydrofuran, chain polymer of
;
Strontium bis(tetrahydridoborate)-bis(diglyme)
;
Barium bis(tetrahydridoborate)-bis(diglyme)
;
Strontium bis(tetrahydridoborate)-1,4,7,13,16-hexaoxacyclooctadecane
;
Metal-hydrogen-boron bridges
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The strontium and barium tetrahydridoborate complexes M(BH4)2 · 2 diglyme and M(BH4)2 · 18-crown-6 (M = Sr, Ba) have been prepared from the solvates M(BH4)2 · 2 THF by ligand displacement. 11B-NMR and IR data reveal strongly polar bonding of the BH4 groups to the metal centers, and X-ray structural analyses of the diglyme and crown ether compounds show molecular units in which the BH4 group is in contact via three H atoms with the metal center. In contrast, M(BH4)2 · 2 THF compounds are chain polymers in the solid state, and each metal center is surrounded by 2 THF molecules in trans position and four BH4- groups each of which forms bridges with two metal centers. Estimations of the effective radius for the BH4 group indicate a high polarity for the M-BH4 interaction.
Zusätzliches Material:
4 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19951280504