Boron and Nitrogen, Boron and Fluorine

This volume, part 3 of the third supplement, continues the updating of the previous volumes on boron compounds: "Boron Compounds" Vols. 1 - 20, "Boron" 1st Suppl. Vol. 1 - 3 (1980/81), "Boron" 2nd Suppl. vols. 1 + 2 (1980/83). This volume deals with the compounds of boron with nitrogen and of boron with fluorine. The modifications of boron nitride are now important materials in modern technology. They have many applications, e.g. as fibers or coatings, in ceramics or alloys, as fillers in organic polymers, for machining of metals and as solid lubricants. They are used in the preparation of semiconductors and in laser nuclear technology. In the chapter on L-triorganyl-N-triorganylborazines, (-Br-Nr-)3, the compound (-B(i-C3H7)-N(t-C4H9)-)3 is the first species having a Dewar-borazine structure, which contains a 1,4 bond and two parallel double bonds in the 6-ring system. Trifluoroborane, BF3, and also its adduct with ether, is important especially in catalytic applications. Among tetra-fluoroborates ÄNOÜ ÄBF4Ü, ÄNO2Ü ÄBF4Ü and ÄNF4Ü ÄBF4Ü are also described. The systems with C1, Br and J with chalcogenes, and finally the carboranes, are contained in the final 4th volume of this series. Volume 4 will also include a formula index for volumes 1 to 4.