化学键能
化学键能
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2023年2月10日发(作者：磁盘分区工具)常见化学键的键长与键能（各种分子中该类键的平均值）
BondLengthsandBondEnergiesofCommonlyChemicalBonds
bondLength/pmenergy/(kJ/mol
Representative
C-C154332
368H
3
C-CH
3
C=C134611
682H
2
C=CH
2
C≡C120837
962HC≡CH
C-H109414
109.4431H-CH
3
410H-CH
2
CH
3
108.3427H-CH=CH
2
105.5523H-C≡CH
392H-CH
2
C≡CH
356H-CH
2
CH=CH
2
108.1423H-环丙基
108.4431H-Ph
314H-CPh
3
310
H
常见化学键的键长与键能（各种分子中该类键的平均值）
BondLengthsandBondEnergiesofCommonlyChemicalBonds
bondLength/pmenergy/(kJ/mol
Representative
C-F138452MeFAlkyl-F
133.3/132.8Alkenyl-F/Aryl-F
127Alkynyl-F
C-Cl177339MeClAlkyl-Cl
172/170Alkenyl-Cl/Aryl-Cl
164Alkynyl-Cl
C-Br194284MeBrAlkyl-Br
189/183Alkenyl-Br/Aryl-Br
180Alkynyl-Br
C-I214232MeIAlkyl-I
C-N147.2331H
3
C-NH
2
301H
2
N-CH
2
Ph
147.5157PhCH
2
N=N-CH
2
Ph
135H
2
N-Ph
132H
2
N-COCH
3
C=N132644H2C=NH
C≡N116937HC≡N
N-H101431H-NHCH3
335H-NHPh
常见化学键的键长与键能（各种分子中该类键的平均值）
BondLengthsandBondEnergiesofCommonlyChemicalBonds
bondLength/pmenergy/(kJ/mol
Representative
C-O142.6335MeO-CH3
136406H3CO-Ac
431HO-Ph
C=O121.5732H2C=O
123.5酯中C=O
F-F140156.9
Cl-Cl199242.58
Br-Br229193.87
I-I266152.55
O-O148(H2O2)157MeO-OMe
O=O120498
bondLength/pmenergy/(kJ/mol
Representative
N-N297H2N-NH2
145213H2N-NHPh
38HN-N2
F-H91.7568.6
Cl-H127.4431.8
Br-H140.8365.7
I-H160.9298.7
O-H95.8()498.7H-OH
97(ROH)436H-OEt
469H-OAc
368H-OPh
Cl-O272
Br-O235
bondlength/pmenergy/(kJ/molbondlength/pmenergy/(kJ/mol
B—F-644N—H101389
B—O-515N—N145159
Br—Br229193N═N125456
C—B156393N≡N110946
C—Br194276N—O146230
N═O114607
Na—Br250367
Na—Cl236412
C—Cl177328Na—F193519
C—F138485Na—H189186
Na—I271304
C—I214240O—H98464
C—N148305O—O148146
C═N135615O═O120498
C≡N116891P—Br220272
C—O143326P—Cl203331
C═O120728P—H142322
C═O(CO2)-803P—O163410
C—P187305P═O138-
C—S182272P—P-213
C═S156536Pb—O192382
C═S(CS2)-577Pb—S239346
C—Si186347Rb—Br294381
Cl—Cl199243Rb—Cl279428
Cs—I337337Rb—F227494
Rb—I318319
H—H75436S—H135339
H—Br142366S—O-364
H—Cl127431S═O143-
H—F92565S—S207268
H—I161298S═S189-
I—I266151Se—H147314
K—Br282380Se—Se232-
K—Cl267433Se═Se215-
K—F217498Si—Cl-360
K—I305325Si—F-552
Li—Cl202469Si—H-377
Li—H239238Si—O-460
Li—I238345Si—Si-176