Bond Dissociation Energies (kcal/mol)

(X-Y -----> X ^. + Y ^. )

Note: These values are the one's used principally in Wade's text. We will use these values. Newer values have been determined by Blanksby and Ellison, Acc. Chem. Res. 2003, 36, 255. The Ellison paper is here in pdf format. For a discussion of heats of reaction, BDEs and heats of formation, click here.

C-H Bonds

CH3-H	CH3CH2-H	(CH3)2CH-H	(CH3)3C-H	CH2=CHCH2-H	PhCH2-H	CH2=CH-H
104	98	95	91	87	85	108

C-C Bonds

CH3-CH3	CH3CH2-CH3	(CH3)2CH-CH3	CH3CH2-CH2CH3	(CH3)3C-CH3
88	85	84	82	81

C-Cl Bonds

CH3-Cl	CH3CH2-Cl	(CH3)2CH-Cl	(CH3)3C-Cl
84	81	80	79

C-Br Bonds

CH3-Br	CH3CH2-Br	(CH3)2CH-Br	(CH3)3C-Br
70	68	68	65

C-I Bonds

CH3-I	CH3CH2 -I	(CH3)2CH-I	(CH3)3C-I
56	53	53	50

H-X and X-X Bonds

H-Cl	H-Br	H-I	H-H	Cl-Cl	Br-Br	I-I	HOOH
103	88	71	104	58	46	36	51