Hydroxy-2-naphthohydroxamic Acid H3NHA

An amount of Cu(0Ac)2 H20 (1.25 g, 6.25 mmol) and tetraethylammonium acetate -4H20 (2.60 g, 10 mmol) are dissolved in 50 mL of DMF. A 50-mL solution of DMF containing H3nha (1.01 g, 5 mmol) is added. The solution immediately turns deep green on addition of the H3nha and is allowed to stir for 2 h prior 

Psomas, A. J.. Stemmier. C. Dendrinou-Samara, J. J. Bodwin, M. Schneider, M. Alexiou, J. W. Kampf, D. P. Kessissoglou, and V. L. Pecoraro, Inorg. Chem. (in press). 

HOMOLEPTIC TRANSITION METAL ACETONITRILE CATIONS WITH TETRAFLUOROBORATE OR TRIFLUOROMETHANESULFONATE ANIONS 

Submitted by ROBERT A. HEINTZ, JENNIFER A. SMITH, PAUL S. SZALAY, AMY WEISGERBER, and KIM R. DUNBAR  

Transition metal cations solvated by weakly coordinating solvents are useful precursors for a variety of nonaqueous synthetic applications. The dissociation of acetonitrile ligands opens up vacant coordination sites for catalysis, and allows transition metals to be introduced into extended arrays formed by condensation reactions with polydentate ligandsAlthough salts of homoleptic acetonitrile metal cations with tetrafluoroborate anions have been known since the 1960s, there has been no detailed description of the syntheses and characterization of these compounds. Likewise, there have been general descriptions of the syntheses of trifluoromethanesulfonate salts, but no specific outline for individual metals has been published. In this report, the syntheses of [M (CH3CN)x][BF4]2 (M = Cr,Mn,Fe,Co,Ni,Cu) and [M CHaCNlJlSOsCFsla (M = Mn,Fe,Co,Ni) are described. Two different methods are used to prepare tetrafluoroborate salts (1) the oxidation of metals with nitrosonium tetrafluoroborate, first described by Hathaway et al. and (2) the dehydration of aqueous tetrafluoroborate salts in a Soxhlet extractor with molecular sieves. The oxidation reaction is rapid, anhydrous, and recommended for smaller-scale preparations because of the relatively 

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