Mavr. Da Silva et Jm. Goncalves, Standard molar enthalpies of formation of eight copper(II) fluorinated beta-diketonates. Mean (Cu-O) bond dissociation enthalpies, J CHEM THER, 30(12), 1998, pp. 1465-1481
The standard (p degrees = 0.1 MPa) molar enthalpies of formation of eight c
opper(II) fluorinated beta-diketonates at the temperature 298.15 K were det
ermined by high-precision solution and reaction calorimetry. The standard m
olar enthalpies of sublimation of the same copper(II) complexes at the temp
erature 298.15 K were determined by effusion methods. From the enthalpies o
f formation of the complexes in the gaseous state, the average molar dissoc
iation enthalpies [D-m] (Cu-O) were derived and compared with identical par
ameters obtained for non-fluorinated copper(II) beta-diketonates.
[GRAPHICS]
The following abbreviations are used in the table: HTFBA, 4,4,4-trifluoro-1
-phenylbutane-1,3-dione; HTFFBD, 4,4,4-trifluoro-1-(2-furanyl)-butane-1,3-d
ione; HTFNBD, 4,4,4-trifluoro-1-(2-naphthyl)-butane-1,3-dione; HTFHD, 1,1,1
-trifluorohexane-2,4-dione; HTFMHD, 1,l,1-trifluoro5-methylhexane-2,4-dione
; HTFDHD, 1,1,1-trifluoro-5,5-dimethylhexane 2,4-dione; HTFMHPD, 1,1,1-trif
luoro-5-methylheptane-2,4-dione; HHPFDOD, 1,1,1,2,2,3,3-heptafluoro-7,7-dim
ethyloctane-4,6-dione. (C) 1998 Academic Press.