Journal
CHEMISTRY LETTERS
Volume 43, Issue 10, Pages 1587-1589Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.140507
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of Japan [19002008, 24350031]
- Grants-in-Aid for Scientific Research [25109543, 24109003] Funding Source: KAKEN
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The first isolable diborane(4) containing terminal B-H bonds, protected by the bulky 1,1,7,7-tetramethyl-3,3,5,5-tetrapropyl-s-hydrindacen-4-yl (MPind) groups, was synthesized as air- and moisture-sensitive colorless crystals. The structure and bonding nature of this H-terminal diborane(4), characterized by X-ray crystallography, NMR studies, and DFT calculations, were compared to those of the previously reported isomer, a doubly H-bridged butterfly-shaped diborane(4) bearing the less bulky 1,1,3,3,5,5,7,7-octaethyl-s-hydrindacen-4-yl (Bind) groups. The two distinct structures of these dihydro-diborane(4) compounds may be primarily attributed to the intramolecular steric effects of the bulky protecting groups.
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