Acetylacetonate complexes, magnetic

Titanium, tris(acetylacetone)-structure, 65 Titanium(III) complexes magnetic behavior, 271 spectra, 250 Titanium tetrachloride photoreactivity, 406 Titrimetry, 552 T oluene-3,4-dithiol in gravimetry, 534 metal complexes liquid-liquid extraction, 547 Topochemical reactions, 463 Topotactic reactions, 463 Trans effect, 16, 26,315 six-coordinate compounds, 49 Trans influence square planar complexes, 38 Transition metal complexes d... 

Nuclear magnetic resonance spectroscopy enabled the two methyl groups of the acetylacetonate complex 15 to be distinguished in CDCI3 solution. 

Complexes of acetylacetone (acacH), benzoylacetone (bzacH) and dipivaloylmethane (dpmH) have been reported. The acetylacetonate [Cr(acac)2] has been prepared from chromium(II) acetate and acetylacetone.142,143 It can also be obtained by the addition of aqueous sodium acetylacetonate to an aqueous solution of chromium(II) chloride, but in any preparation the yellow solid must be filtered off and dried as rapidly as possible, otherwise the chromium(III) compound is obtained. Its magnetic moment is 4.99 BM at room temperature consistent with a high-spin d4 configuration. 142The powerful reducing ability of [Cr(acac)2] has been used to prepare iron(II) and chromium(II) complexes80 of porphyrins and related ligands. 

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