Synonyms: Hafnium,tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato-O,O')-; Hafnium,tetrakis(2,2,6,6-tetramethyl-3,5-heptanedionato-kO,kO')-, (SA-8-11''11''1'1'''1'1''')- (9CI); 3,5-Heptanedione,2,2,6,6-tetramethyl-, hafnium complex; Hafnium tetrakis(dipivaloylmethanate);NSC 174885; Tetrakis(2,2,6,6-tetramethylheptane-3,5-dionato)hafnium;Tetrakis(dipivaloylmethanato)hafnium