Compilation of data on molar heat capacities, and heat capacity differences, for tris(β-diketonato)iron(iii) complexes at 298.15 K (in J K⁻¹ mol⁻¹).

Complex	a	b	c	b
1	2	3	4	5
Fe(acac)3	429.9 (ref. 55)	65.2	460.9	130.4
Fe(Meacac)3	512.7	77.7	543.7	151.9
Fe(tfac)3	521.4	79.0	552.4	154.2
Fe(hfac)3	654.9 (ref. 55)	99.0	685.9	188.9
Fe(ba)3	608.1	92.0	639.1	176.7
Fe(dbm)3	786.2	118.7	817.2	223.1
Fe(thd)3	887.7 (ref. 55)	133.9	918.7	249.4

^aCalculated by group contribution method by Chickos et al.^9,10 with the contributions adjusted for the tris(β-diketonato)iron(iii) complexes derivatives (see text).

^bCalculated according to eqn (4) and (5).

^cCalculated as = + 31 J K⁻¹ mol⁻¹. The contribution of 31 J K⁻¹ mol⁻¹ was derived from experimental data on and for ferrocene¹⁵ and was assumed to be valid for tris(β-diketonato)iron(iii) complexes.