The first room-temperature liquid, flash-vaporizable barium compounds were prepared by reacting barium beta-diketonates with alkyl-substituted triamine and tetramine ligands. For example, barium bis(2,2,6,6-tetramethylheptane-3,5-dionate) (Ba(thd)2) reacts with N,N′,N′′-triamyldiethylenetriamine (tadeta) to form a viscous liquid that is miscible with additional amine and organic solvents, forming low-viscosity solutions. Thermal decomposition studies showed that Ba(thd)2·tadeta is more stable than a similar amine complex of barium 2,2,6-trimethylheptane-3,5-dionate (Ba(3hd)2). This difference in thermal stability can possibly be explained by a beta-hydrogen elimination mechanism operating only in the latter barium compound. Copyright © 2000 John Wiley & Sons, Ltd.

Roy G Gordon

Se�n Barry

Synthesis and solution decomposition kinetics of flash-vaporizable liquid Barium Beta-diketonates

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