Affordable Access

Publisher Website

Standard enthalpies of formation of tris(β-diketonate) iron(III) complexes: the mean (FeO) bond-dissociation enthalpies

Authors
Journal
The Journal of Chemical Thermodynamics
0021-9614
Publisher
Elsevier
Publication Date
Volume
20
Issue
1
Identifiers
DOI: 10.1016/0021-9614(88)90211-x

Abstract

Abstract The standard ( p o = 101.325 kPa) molar enthalpies of formation of the crystalline complexes of iron(III) with 1-phenylbutane-1,3-dione ( hbzac), 2,2,6,6-tetramethylheptane-3,5-dione ( hdpm), 1,1,1-trifluoropentane-2,4-dione ( htfac), and 1,1,1,5,5,5-hexafluoropentane-2,4-dione ( hhfac) were determined, at 298.15 K, by solution-reaction calorimetry. The enthalpies of sublimation of the crystalline complexes were determined by high-temperature microcalorimetry, and average molar bond-dissociation enthalpies 〈 D m〉(FeO) were derived, based on an estimated D m(OH,Hl,enol) (kJ·mol −1) = (418 ± 20) . Fe(III)complex Δ f H m o(cr) (kJ·mol −1) Δ sub H m o (kJ·mol −1) 〈D m〉(FeO) (kJ·mol −1) Fe(bzac) 3 −985.2 ± 8.5 200 ± 5 175 ± 10 Fe(dpm) 3 −1813 ± 12 146 ± 5 183 ± 10 Fe(tfac) 3 −3220 ± 15 138 ± 5 176 ± 11 Fe(hfac) 3 −5115 ± 15 120 ± 10 180 ± 11

There are no comments yet on this publication. Be the first to share your thoughts.