National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 22May 2022
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
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IXFeedback
XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
XVIBibliographic data
XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

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II.B.3. (XII.A.3.)

List of experimental bond lengths for bond type rCC

Bond lengths in Å.
Click on an entry for more experimental geometry data.
bond type Species Name Length Comment
rCC C4N2 2-Butynedinitrile 1.370
rCC HCCCN Cyanoacetylene 1.376
rCC C4H2 Diacetylene 1.378
rCC C2N2 Cyanogen 1.389
rCC C5H5N Bicyclo[1.1.0]butane-1-carbonitrile 1.398 !assumed, from ring out
rCC C2H2CO cyclopropenone 1.412
rCC C9H8 Indene 1.415 mean value of ALL CC bonds
rCC C4H5N Pyrrole 1.417
rCC C3H4N2 1H-Pyrazole 1.417
rCC C6H12O hexanal 1.420
rCC C2H2N2O Furazan 1.421
rCC C5H6 Cyclopropylacetylene 1.422
rCC C5H6S Thiophene, 3-methyl- 1.423 !assumed, between 2=
rCC C4H4S Thiophene 1.423
rCC C3H3NO Isoxazole 1.425
rCC C3H3N acrylonitrile 1.426
rCC C4H5NO Isoxazole, 5-methyl- 1.427 !assumed, opp O
rCC C4H5NO 3-Methylisoxazole 1.427 !assumed, opp N
rCC C3H5 Allyl radical 1.428
rCC C4H4N2O2 Uracil 1.430
rCC C4H4O Furan 1.431
rCC C4H5N (E)-2-Butenenitrile 1.432 next to C=N
rCC C4H4Se selenophene 1.433
rCC C2H3CCH 1-Buten-3-yne 1.434
rCC C6H6 Trimethylenecycopropane 1.437
rCC C5H6 1-Buten-3-yne, 2-methyl- 1.445 between # and =
rCC C6H5CCH phenylacetylene 1.448
rCC C6H5CN phenyl cyanide 1.451
rCC C6H6 Benzvalene 1.452
rCC HCCCHO 2-propynal 1.453
rCC C5H7N Cyclobutanecarbonitrile 1.454
rCC CH2ClCCCl 1,3-dichloropropyne 1.456
rCC CHCCH2CH3 1-Butyne 1.457
rCC C4H6 Methylenecyclopropane 1.457 from =C-C
rCC CH3CN Acetonitrile 1.458
rCC C6H8 (Z)-hexa-1,3,5-triene 1.458
rCC C3H2N2 Malononitrile 1.459 average structure
rCC C2H4O Ethylene oxide 1.459
rCC CH3CCH propyne 1.460
rCC C5H6 1,3-Cyclopentadiene 1.460
rCC CH(CN)3 tricyanomethane 1.460
rCC C5H8 1,3-Butadiene, 2-methyl- 1.463 both C's have =
rCC C4H4N2 Succinonitrile 1.465 end CC bond
rCC C10H10 bullvalene 1.465
rCC C6H8 1,3-Cyclohexadiene 1.466 single bond between double bonds
rCC CH3CCCH3 2-Butyne 1.468
rCC CH2CHCHO Acrolein 1.468
rCC C2H5CN ethyl cyanide 1.468
rCC CH2CClCHCH2 1,3-Butadiene, 2-chloro- 1.469
rCC C6H6 Fulvene 1.470 from C with methylene
rCC CHOCHCHCH3 2-Butenal 1.470 !assumed, from C=O
rCC C8H8 cyclooctatetraene 1.470 re
rCC C3H6O Propylene oxide 1.471 !assumed, opp O
rCC C4H5N Cyclopropanecarbonitrile 1.472 towards C#N
rCC C3H5ClO Oxirane, (chloromethyl)- 1.475 ring
rCC C5H8 Ethenylcyclopropane 1.475 out of ring
rCC C3H4O Cyclopropanone 1.475
rCC C4H6 1-Methylcyclopropene 1.476
rCC C6H6 Fulvene 1.476 opposite methylene
rCC CH2CHCHCH2 1,3-Butadiene 1.476
rCC C5H9N Pentanenitrile 1.478 towards N
rCC CH2CHCHO Acrolein 1.479
rCC CH2CHCH2F Allyl Fluoride 1.480
rCC C2H5N Aziridine 1.481
rCC CH3CH(CH3)CN Propanenitrile, 2-methyl- 1.481
rCC C5H8 Spiropentane 1.482
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.482
rCC C5H10 2-Pentene, (E)- 1.484 next to =
rCC C2H4S Thiirane 1.484
rCC C(CN)4 tetracyanomethane 1.484
rCC C4H2O3 Maleic Anhydride 1.485
rCC CH2CHCH3 Propene 1.488
rCC CH2CHCH2F Allyl Fluoride 1.488
rCC C4F6 perfluorobutadiene 1.488
rCC C12H10 biphenyl 1.489
rCC C5H10 2-Pentene, (Z)- 1.490 end C to C=
rCC CF3CN Acetonitrile, trifluoro- 1.492
rCC C2H4F2 1,2-difluoroethane 1.493 r0
rCC CH2CHCH2CH3 1-Butene 1.493 closest to =
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.494
rCC CH3CF3 Ethane, 1,1,1-trifluoro- 1.494
rCC HOCH2COOH Hydroxyacetic acid 1.495
rCC CH2ClCHCHCH3 2-Butene, 1-chloro- 1.496 average
rCC C4H6 Bicyclo[1.1.0]butane 1.497 across ring
rCC C4H6 Bicyclo[1.1.0]butane 1.498
rCC CH3CHF2 Ethane, 1,1-difluoro- 1.498
rCC C5H5N Bicyclo[1.1.0]butane-1-carbonitrile 1.498
rCC CH3CHO Acetaldehyde 1.501
rCC C3H6 Cyclopropane 1.501 re values
rCC C5H6 1-Buten-3-yne, 2-methyl- 1.501 !assumed, C= to CH3
rCC CH2C(CH3)OCH3 1-Propene, 2-methoxy- 1.501
rCC CH2FCH2CH3 1-Fluoropropane 1.501
rCC C2H4F2 1,2-difluoroethane 1.501
rCC C4H5N (E)-2-Butenenitrile 1.501 !assumed, to end
rCC CHOCHCHCH3 2-Butenal 1.501 !assumed, to end
rCC C4H6O Furan, 2,5-dihydro- 1.502
rCC C3H6O 2-Propen-1-ol 1.502
rCC C6H10O cyclohexanone 1.503
rCC C6H6 Benzvalene 1.503
rCC CH3COF Acetyl fluoride 1.503
rCC CH2CHCHClCH3 1-Butene, 3-chloro- 1.503
rCC C5H6 Cyclopropylacetylene 1.503
rCC C4H10O2 Ethane, 1,2-dimethoxy- 1.504 !assumed
rCC C5H8O Cyclopentanone 1.504 C has =O
rCC C2H5F fluoroethane 1.505 rs
rCC C4H5NO Isoxazole, 5-methyl- 1.505 to methyl
rCC CH3CHS Thioacetaldehyde 1.506
rCC CH3CHCHCH3 2-Butene, (Z)- 1.506
rCC CH3COCl Acetyl Chloride 1.506 rg
rCC CH3COCH2CH3 2-Butanone 1.507
rCC CH2C(CH3)CH3 1-Propene, 2-methyl- 1.507
rCC C4H6O2 2,3-Butanedione 1.507
rCC C5H8 Bicyclo[2.1.0]pentane 1.507 tri
rCC CHF2CHF2 1,1,2,2-tetrafluoroethane 1.508
rCC CH3CHCHCH3 2-Butene, (E)- 1.508
rCC CH2CHCH2CH2Cl 1-Butene, 4-chloro- 1.508 next to =
rCC C4H8O2 Ethyl acetate 1.508 rg, from =O
rCC CH3CH2CHO Propanal 1.509 C with =O
rCC CH3CH(NH2)COOH Alanine 1.509 to end C
rCC C5H4O2 4-Cyclopentene-1,3-dione 1.509
rCC C3H4 cyclopropene 1.509
rCC CH3CH2Cl Ethyl chloride 1.510
rCC C6H10 cyclohexene 1.510
rCC C5H8O 2H-Pyran, 3,4-dihydro- 1.510 !assumed, C has a =
rCC C5H8O Methyl cyclopropyl ketone 1.510 !average
rCC C6H8 1,4-Cyclohexadiene 1.511
rCC CHF2CHF2 1,1,2,2-tetrafluoroethane 1.511
rCC C5H8 1,4-Pentadiene 1.511
rCC C6H12 2,3-dimethyl-but-2-ene 1.511
rCC C6H12 (E)-3-methylpent-2-ene 1.511 average, any C from =C
rCC C6H12O hexanal 1.511
rCC CH3CSNH2 Ethanethioamide 1.512
rCC CH3CH2OH Ethanol 1.512
rCC C5H8 1,3-Butadiene, 2-methyl- 1.512 to methyl C
rCC CH3COCH2CH3 2-Butanone 1.512 cental CC bond
rCC C6H5CH3 toluene 1.513
rCC C3F6 hexafluoropropene 1.513
rCC C3H6O Propylene oxide 1.513 out of ring
rCC C6H10 Bicyclo[3.1.0]hexane 1.513
rCC C6H10 Bicyclo[3.1.0]hexane 1.513
rCC C4H5N Cyclopropanecarbonitrile 1.513 opp C with extra
rCC C4H5NO 3-Methylisoxazole 1.514 from C with -N
rCC C5H5N Bicyclo[1.1.0]butane-1-carbonitrile 1.514 from apex
rCC C5H8 1,2-Butadiene, 3-methyl- 1.514
rCC C3H8O2 1,3-Propanediol 1.514
rCC C5H10 Cyclopropane, 1,1-dimethyl- 1.514 to C outside ring
rCC C4H6 1-Methylcyclopropene 1.515 !assumed, opp extra C
rCC CH2CCHCH3 1,2-Butadiene 1.515
rCC C4H8O2 Ethyl acetate 1.515 rg, from O
rCC C5H8O 2H-Pyran, 3,4-dihydro- 1.516 C has a -O
rCC C4H10O Methyl propyl ether 1.516 propyl side, near O
rCC C4H6 Cyclobutene 1.517 =C to C
rCC CH3COOH Acetic acid 1.517
rCC C4H10O Ethoxy ethane 1.517 rs
rCC C2H5Br Ethyl bromide 1.518
rCC C5H8 Cyclopentene 1.518 one C has =
rCC C4H6S Thiophene, 2,5-dihydro- 1.518
rCC C3H4O Methylketene 1.518
rCC C5H5N Bicyclo[1.1.0]butane-1-carbonitrile 1.518 from apex
rCC C4H10O Propane, 2-methoxy- 1.519
rCC CH3CONH2 Acetamide 1.519
rCC CH2ClCHClCH3 Propane, 1,2-dichloro- 1.519
rCC CH3COCH3 Acetone 1.520
rCC CH3CHSHCH3 2-Propanethiol 1.520 !assumed
rCC C5H10 Cyclopropane, 1,1-dimethyl- 1.520 !assumed, ring bonds
rCC C3H7N Cyclopropylamine 1.520
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.521
rCC CH3CH2O Ethoxy radical 1.521
rCC C6H8 1,3-Cyclohexadiene 1.521
rCC CH3OC2H5 Ethane, methoxy- 1.521
rCC CH3CHFCH3 2-Fluoropropane 1.521
rCC C2H5I Ethyl iodide 1.521
rCC CH2ClCHO chloroacetaldehyde 1.521
rCC CH3CHClCH3 Propane, 2-chloro- 1.522
rCC CH3CH(CH3)CN Propanenitrile, 2-methyl- 1.522 !assumed, to methyl C's
rCC CHCl2CH2CH3 1,1-dichloropropane 1.522
rCC C4H8O2 1,3-Dioxolane, 2-methyl- 1.522 average
rCC CH2CHCHClCH3 1-Butene, 3-chloro- 1.522
rCC C5H8 Ethenylcyclopropane 1.522 average, ring
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.522
rCC C10H10 bullvalene 1.523
rCC CH3CCl2CH3 Propane, 2,2-dichloro- 1.523
rCC C3H5ClO Oxirane, (chloromethyl)- 1.523
rCC CH3CH2CHO Propanal 1.523 CH3-CH2
rCC C3H5Cl3 Propane, 1,2,3-trichloro- 1.524
rCC C6H5CH2CH3 Ethylbenzene 1.524
rCC C12H8 biphenylene 1.524
rCC C5H8 Cyclobutane, methylene- 1.524 from C with methylene
rCC C5H10O 2-Butanone, 3-methyl- 1.525 average, from C with =O
rCC CH2ClCH2CH3 Propane, 1-chloro- 1.525
rCC CH2ClCH2CH3 Propane, 1-chloro- 1.525
rCC CH3CH(CH3)CH3 Isobutane 1.525
rCC C5H6 Propellane 1.525 ax-eq
rCC C3H8 Propane 1.526
rCC C2H2O2 Ethanedial 1.526 rg values
rCC C2H5CN ethyl cyanide 1.526
rCC C4H6O2 2,3-Butanedione 1.527
rCC C4H6O Cyclobutanone 1.527 one carbon is C=O Only RING structure parameters, need O and H ones to complete
rCC C5H6 Cyclopropylacetylene 1.527
rCC CH2CHCH2CH2Cl 1-Butene, 4-chloro- 1.528 !assumed
rCC C5H10S 2H-Thiopyran, tetrahydro- 1.528 average
rCC C2H5NO3 Nitric acid, ethyl ester 1.528
rCC C4H8O2 1,3-Dioxane 1.528
rCC C4H10O Propane, 2-methoxy- 1.528
rCC C5H8 Bicyclo[2.1.0]pentane 1.528 from tri
rCC CH3CH2SH ethanethiol 1.528
rCC CHOCH(CH3)CH3 Propanal, 2-methyl- 1.528 average
rCC C4H10O Ethanol, 1,1-dimethyl- 1.529
rCC CH3CH2SH ethanethiol 1.529
rCC C3H7SH 1-Propanethiol 1.529 by S
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.529
rCC C6H6 Benzvalene 1.529
rCC C6H8 Bicyclo[3.1.0]hex-2-ene 1.530
rCC CH3SCH2CH3 Ethane, (methylthio)- 1.530
rCC C5H6S Thiophene, 3-methyl- 1.530
rCC CH3CCl(CH3)CH3 Propane, 2-chloro-2-methyl- 1.530
rCC C4H10O Methyl propyl ether 1.530 propyl side, from end C
rCC CH2SHCH2SH 1,2-Ethanedithiol 1.530
rCC C6H10 Bicyclo[3.1.0]hexane 1.530
rCC C2H6O2 1,2-Ethanediol 1.530 !assumed
rCC C6H12 Cyclohexane 1.530
rCC C5H8O 2H-Pyran, 3,4-dihydro- 1.530 !assumed
rCC C6H10 cyclohexene 1.530
rCC C6H10 cyclohexene 1.530
rCC C5H6 Bicyclo[2.1.0]pent-2-ene 1.530 edge of square
rCC C7H8 Norbornadiene 1.530
rCC C5H11N Piperidine 1.531
rCC C5H10O 2H-Pyran, tetrahydro- 1.531
rCC C5H12 Pentane 1.531
rCC CH2ClCH2Cl Ethane, 1,2-dichloro- 1.531 ra
rCC CH3CH2NH2 Ethylamine 1.531
rCC CH3COCH2CH3 2-Butanone 1.531 ethyl CC
rCC CH3CH2CH2CH3 Butane 1.531 rg
rCC C(CH3)3NH2 2-Propanamine, 2-methyl- 1.532 average
rCC C6H12O hexanal 1.532
rCC H2NCH2COOH Glycine 1.532
rCC C4H8S Thiophene, tetrahydro- 1.532
rCC C5H12O Butane, 1-methoxy- 1.532 average
rCC C6H12O hexanal 1.533
rCC C6H14 Hexane 1.533
rCC CH2ClCH2CH2CH3 Butane, 1-chloro- 1.533 average
rCC C7H16 heptane 1.534 rg
rCC C4H9N Pyrrolidine 1.534
rCC CH3CHClCH2CH3 Butane, 2-chloro- 1.534 average
rCC ClCOClCO Oxalyl chloride 1.534
rCC CH2FCH2CH3 1-Fluoropropane 1.534
rCC CH3CH(CH3)ONO Isopropyl nitrite 1.534 assumed
rCC C5H10O 2-Butanone, 3-methyl- 1.534 average
rCC C6H5CH2CH3 Ethylbenzene 1.535
rCC CH2CHCH2CH3 1-Butene 1.536 farthest from =
rCC C2H6 Ethane 1.536
rCC C5H8 Bicyclo[2.1.0]pentane 1.536 to tri
rCC C4H8O Furan, tetrahydro- 1.536
rCC C5H9N Pentanenitrile 1.536
rCC C3H7SH 1-Propanethiol 1.536 !assumed, other end from S
rCC C6H8 1,3-Cyclohexadiene 1.536
rCC C7H12 Norbornane 1.536
rCC C5H12 Propane, 2,2-dimethyl- 1.537
rCC C10H16 adamantane 1.540
rCC C5H6 1,3-Cyclopentadiene 1.540
rCC C5H8 Cyclopentene 1.540 !assumed
rCC C3H8O2 Propylene glycol 1.540
rCC CH3CHCl2 Ethane, 1,1-dichloro- 1.540
rCC C6H10O cyclohexanone 1.542
rCC C3H6O2 1,3-Dioxolane 1.542
rCC C10H10 bullvalene 1.542
rCC C4H6 Methylenecyclopropane 1.542
rCC C3H6O Oxetane 1.543
rCC C6H8 Bicyclo[2.1.1]hex-2-ene 1.544 average
rCC CHCCH2CH3 1-Butyne 1.544
rCC C2H2O4 Oxalic Acid 1.544
rCC CH3CH(NH2)COOH Alanine 1.544 to C with 2O
rCC C2H8N2 Ethylenediamine 1.545
rCC C6H10O cyclohexanone 1.545
rCC CF3COOH trifluoroacetic acid 1.546 ra
rCC C3F8 perfluoropropane 1.546
rCC C7H12 Norbornane 1.546
rCC C5H10 Cyclopentane 1.546
rCC C3H6S Thietane 1.549
rCC CF3CCl3 1,1,1-trifluoro-2,2,2-trichloroethane 1.549
rCC CH3CCl3 Ethane, 1,1,1-trichloro- 1.550
rCC CH3CHNOH Acetaldoxime 1.550 !assumed
rCC C6H12 (E)-3-methylpent-2-ene 1.551 in ethyl
rCC C5H7N Cyclobutanecarbonitrile 1.551 estimated using ab initio difference
rCC C4H8 cyclobutane 1.555
rCC C4H6O Cyclobutanone 1.556 NO GEOMETRY has been calculated for this molecule
rCC C7H8 Norbornadiene 1.557
rCC C5H8O Cyclopentanone 1.557
rCC C5H8 Spiropentane 1.557
rCC C5H8 Cyclobutane, methylene- 1.557
rCC C5H7N Cyclobutanecarbonitrile 1.557
rCC C5H8 Bicyclo[1.1.1]pentane 1.557
rCC C2F6 hexafluoroethane 1.560
rCC C5H6 Bicyclo[2.1.0]pent-2-ene 1.560 connection to tri
rCC C4H4N2 Succinonitrile 1.561 middle CC bond
rCC C5H10 2-Pentene, (Z)- 1.561 end away from =
rCC C3H7N Azetidine 1.563
rCC C5H8 Bicyclo[2.1.0]pentane 1.565 edge opp tri
rCC C4H6 Cyclobutene 1.566
rCC C8H8 cubane 1.571
rCC C7H12 Norbornane 1.573
rCC C3H4O Cyclopropanone 1.575 opposite =C
rCC C5H10 2-Pentene, (E)- 1.576 end C
rCC CH2ClCHCl2 1,1,2-trichloroethane 1.580 !assumed
rCC C6H12O hexanal 1.596
rCC C5H6 Propellane 1.596 ax-ax
 
Average 1.508 ±0.039
Min 1.370
Max 1.596