Crystal structure of the strongly hydrogen bonded complex anion [(C 6F 5) 3B(H 3O 2)B(C 6F 5) 3]

The highly electrophilic borane B(C 6F 5) 3 reacts with water to form the aqua complex H 2OB(C 6F 5) 3·2H 2O, which is deprotonated by 1,8-bis(dimethylamino)naphthalene (proton sponge) to form the salt [C 10H 6(NMe 2) 2H][(C 6F 5) 3B(H 3O 2)B(C 6F 5) 3]. The complex anion is characterized crystallog...

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Bibliographic Details
Published in:Inorganica Chimica Acta 2002-11, Vol.340, p.207-210
Main Authors: Drewitt, Mark J, Niedermann, Martina, Baird, Michael C
Format: Article
Language:English
Subjects:
Complex anion
Crystal structures
Hydrogen bonding
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Summary:The highly electrophilic borane B(C 6F 5) 3 reacts with water to form the aqua complex H 2OB(C 6F 5) 3·2H 2O, which is deprotonated by 1,8-bis(dimethylamino)naphthalene (proton sponge) to form the salt [C 10H 6(NMe 2) 2H][(C 6F 5) 3B(H 3O 2)B(C 6F 5) 3]. The complex anion is characterized crystallographically and asymmetry is found, suggesting that this is the first example of the theoretically predicted asymmetrically hydrogen bonded [H 3O 2] − ion. There also appears to be evidence for significant CF⋯HO hydrogen bonding in the complex anion that may be responsible in part for the overall structure of the anion. The salt [C 10H 6(NMe 2) 2H][(C 6F 5) 3B(H 3O 2)B(C 6F 5) 3] is characterized crystallographically, and the complex anion is found to contain the theoretically predicted asymmetrically hydrogen bonded [H 3O 2] − ion. There also appears to be strong evidence for significant CF⋯HO hydrogen bonding in the complex anion.
ISSN:0020-1693
1873-3255
DOI:10.1016/S0020-1693(02)01066-6