ISSN:
0009-2940
Keywords:
Boranes, (tert-butylamino)(diorganylphosphinoyloxy)(tetramethylpiperidino)-
;
Borates, (tert-butylammonium)-tetrakis(dimethylphosphinoyloxy)-
;
Phosponates, bis[(tert-butylamino)(tetramethylpiperidino)boryl]
;
Phosphate, tris[(tert-butylamino)(tetramethylpiperidino)boryl]
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Reactions of an Amino Imino Borane with Phosphinic, Phosphonic, and Phosphoric AcidsControlled 1:1 reactions of R2P(O)OH with tmp - B = NtBu (1) (tmp = 2,2,6,6-tetramethylpiperidino group) in hexane leads to R2P(O)OB(tmp)NHtBu (2). In most other cases mixtures of 2 with other products are obtained. Application of a 4:1 ratio of Me2P(O)OH and 1 results in the formation of pure [tBuNH3][B(OP(O)Me2)4] (3). Reaction of phosphonic acids with 1 in hexane at about -30°C leads preferentially to the addition of the acid to produce RP(O)[OB(tmp)NHtBu]2 (4), while H3PO4 reacts with 1 to yield OP[OB(tmp)NHtBu]3 (6). Species containing tetracoordinated boron atoms are formed as well in dichloromethane as a solvent. Spectral data for the compounds 2, 4, and 6 reveal three-coordinate boron atoms, confirmed by an X-ray structure analysis of 2a (R = CH3). This compound displays a fairly large B - O - P bond angle, 140.6(3)°.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19911240803
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