LITHIUM DICYANAMIDE, ITS REACTIONS WITH CYANURIC CHLORIDE, AND THE CRYSTAL-STRUCTURES OF LIN(CN)(2)(MECN)(2) AND LICN(C5H5N)(2)

Citation
Ap. Purdy et al., LITHIUM DICYANAMIDE, ITS REACTIONS WITH CYANURIC CHLORIDE, AND THE CRYSTAL-STRUCTURES OF LIN(CN)(2)(MECN)(2) AND LICN(C5H5N)(2), Polyhedron, 16(20), 1997, pp. 3671-3679
Citations number
37
Categorie Soggetti
Chemistry Inorganic & Nuclear",Crystallography
Journal title
ISSN journal
02775387
Volume
16
Issue
20
Year of publication
1997
Pages
3671 - 3679
Database
ISI
SICI code
0277-5387(1997)16:20<3671:LDIRWC>2.0.ZU;2-H
Abstract
Reactions of dicyanamides with cyanuric chloride were investigated as possible routes to carbon nitrides. Anhydrous lithium dicyanamide (1) was synthesized from NaN(CN)(2) and LiCl in THF. Compound 1 was found to react with cyanuric chloride to form a yellow product, which forms an amorphous lithium-carbon nitride with an approximate formula CN0.7L i0.2 upon thermolysis to 700 degrees C. Upon heating to 1000 degrees C , the product decomposes with the distillation of lithium cyanide. Rea ctions between cyanuric chloride and trimethylstannyl dicyanamide were also investigated. Lithium dicyanamide was also found to trimerize an d polymerize at 280-320 degrees C. Additionally, two Li-C-N complexes were structurally characterized. The bis (acetonitrile) adduct of 1 cr ystallizes with the lithium atoms linking the cyano nitrogens into inf inite Li-N=C-N-C=N-chains, and the bis(pyridine) adduct of LiCN consis ts of infinite zig-zag -Li-C=N-chains. (C) 1997 Elsevier Science Ltd.