Table 6.

Calculation of the formation enthalpies of the studied substances using the addictive Benson scheme for 5-nitrophenyl-2-furaldehyde oxime isomers

Substance	№	Increment	ΔfH298.15, kJ mol−1
	1–4	Cb–(Cb)2(H)	13.8
	5	Cb–(Cb)2(Cd)	23.8
	6	Cb–(Cb)2(NO2)	− 0.5
	7	Cd–(Cd)(Cb)(O)	59.7
	8,9	Cd–(Cd)2(H)	28.4
	10	Cd–(Cd)2(O)	43.4
	11	O–(Cd)2	− 137.2
	12	Cd–(Cd)(H)(N–OH)*	33.0
	Furan cycle		− 25.9

Δ_fH_298,15 = 4·Δ_fH_298,15(C_b–(C_b)₂(H)) + Δ_fH_298,15(C_b−(C_b)₂(C_d)) + Δ_fH_298,15(C_b–(C_b)₂(NO₂)) + Δ_fH_298,15(C_d–(C_d)(C_b)(O)) + 2·Δ_fH_298,15(C_d–(C_d)₂(H)) + Δ_fH_298,15(C_d–(C_d)₂(O)) + Δ_fH_298,15(O–(C_d)₂) + Δ_fH_298,15(C_d–(C_d)(H)(N–OH)) + Δ_fH_298,15(Furan cycle) = 4·13.8 + 23.8 − 0.5 + 59.7 + 2·28.4 + 43.4 − 137.2 + 33.0 − 25.9 = 108.3 kJ/mol