Bonds

Bond lengths

Single-bond lengths (in Å)

	H	C	N	O	F	Si	P	Si	Cl	Br	I
H	0.74	1.10	0.98	0.94	0.92	1.45	1.38	1.32	1.27	1.42	1.61
C		1.54	1.47	1.43	1.41	1.94	1.87	1.81	1.76	1.91	2.10
N			1.40	1.36	1.34	1.87	1.80	1.74	1.69	1.84	2.03
O				1.32	1.30	1.83	1.76	1.70	1.65	1.80	1.99
F					1.28	1.81	1.74	1.68	1.63	1.78	1.97
Si						2.34	2.27	2.21	2.16	2.31	2.50
P							2.20	2.14	2.09	2.24	2.43
Si								2.08	2.03	2.18	2.37
Cl									2.00	2.13	2.32
Br										2.28	2.47
I											2.66

Multi-bond lengths (in Å)

Bond	Length
C=C	1.34
C=N	1.27
C=O	1.22
N=O	1.15
C≡C	1.21
C≡N	1.15
C≡O	1.13
N≡O	1.08

Bond energies

Average single bond dissociation energies (in kJ mol^–1)

	H	C	N	O	F	Si	P	Si	Cl	Br	I
H	436	413	391	463	565	328	322	347	432	366	299
C		346	305	358	485	–	–	272	339	285	213
N			163	201	283	–	–	–	192	–	–
O				146	–	452	335	–	218	201	201
F					155	565	490	284	253	249	278
Si						222	–	293	381	310	234
P							201	–	326	–	184
Si								226	255	–	–
Cl									242	216	208
Br										193	175
I											151

Average multi-bond dissociation energies (in kJ mol^–1)

Bond	Bond Energy
N=N	418
N≡N	945
C=N	615
C≡N	887
O=O (in O2)	498
C=C	610
C≡C	835
C=O	745
C=O (in CO2)	83
C≡O	1046