Interim technical rept.
KENTUCKY UNIV LEXINGTON DEPT OF CHEMISTRY
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1,3-Dimethyl-2-N-triazolyl-1,3,2-diazaboracycloalkanes, tz BNCH3CH2nNCH3 where Htz 1,2,3-triazole 1, 1,2,4-triazole 2, benzotriazole 4 n 2,3 have been synthesized by condensation procedures. The resultant species are monomeric and contain three-coordinate boron they do not dimerize at temperatures as low as -50 C. Compounds of type 1, however, exist as a mixture of the 1- and 2-isomers, whereas 2 and 4 are the 1-isomers exclusively. Only species of type 2 are fluxional at elevated temperatures, those of type 1 and 4 are static up to 80 C. However, the monomeric N- triazolylboranes have remaining Lewis acidity and can complex with additional Htz. Based on this feature, representative bis1-triazolyldiorganylborates, Natz2BR2 Htz 1,2,4-triazole R C2H5 or 12 C8H14 where C8H14BH 9- borabicyclo3.3.1nonane, were readily obtained by the reaction of dimethylaminodiorganylboranes with 1 molar equiv of Htz and subsequent treatment with 1 molar equiv of Mtz M alkali metal. The salts were converted to some representative complexes, e.g., R2Bmu-tz2Pdpi-CH2CHCH2.
- Organic Chemistry