National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 19April 2018
NIST Standard Reference Database 101
IIntroduction
IIExperimental data
IIICalculated data
IVData comparisons
VCost comparisons
VIInput and output files
VIITutorials and Units
VIIILinks to other sites
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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IV.D.3.a. (XVIII.A.3.)

Species with point groups that differ from experiment at MP2/3-21G

  Point group
Species Name Experimental Calculated
HD Deuterium hydride C∞v D∞h
C2H4+ Ethylene cation D2h D2
HCN+ hydrogen cyanide cation C∞v Cs
NH3NH3 Ammonia Dimer C2h Cs
BeOH beryllium hydroxide Cs C∞v
H2O2 Hydrogen peroxide C2 C2h
CH3S thiomethoxy C3v C1
C3 carbon trimer D∞h C2v
BO2 Boron dioxide D∞h C∞v
BO2 Boron dioxide D∞h C∞v
HCCO ketenyl radical C∞v Cs
HCNO fulminic acid Cs C∞v
CaF2 Calcium difluoride C2v D∞h
Zn(CH3)2 dimethyl zinc D3d C2v
C4 Carbon tetramer D∞h C2h
C4 Carbon tetramer D∞h C2h
C4H2 Diacetylene D∞h C2h
C4H2 Diacetylene C∞v C2h
ONNO NO dimer C2h C2v
CH3COO- acetate anion Cs C1
CH3NO2 Methane, nitro- Cs C1
HCONHCH3 N-methylformamide Cs C1
CF3+ Trifluoromethyl cation D3h C3v
SO3- Sulfur trioxide anion D3h C3v
NH2CSNH2 Thiourea C2 C2v
CH2ClCHO chloroacetaldehyde Cs C1
CH2ClCHO chloroacetaldehyde C1 Cs
C3H5Cl 1-Propene, 3-chloro- Cs C1
CH2ClCH2OH2+ 2-chloroethanol, protonated C1 Cs
C5H8 1,3-Pentadiene, (E)- Cs C1
C4H9N Pyrrolidine Cs C1
C(NH2)H2CH2CH2CH3 1-Butanamine C1 Cs
C4H6O Cyclobutanone C2v Cs
C3H7NO Propanamide C1 Cs
CHCl2CHO dichloroacetaldehyde C1 Cs
C6H10 2-Hexyne Cs C1
C6H14 Butane, 2,2-dimethyl- C1 Cs
C2O4-- oxalate anion D2d D2h
C2H5NO3 Nitric acid, ethyl ester C1 Cs
C5H5NO 3(2H)-Pyridinone Cs C1
C5H5NO 4(3H)-Pryidinone Cs C1
C5H5NO 4(1H)-Pryidinone C2v Cs
C6H5CHCH2 Styrene Cs C1
C8H14 Bicyclo[2.2.2]octane D3h D3
C6H12O2 Hexanoic acid Cs C1
C4F4 tetrafluorcyclobutadiene C2h D4h
CH3COC6H5 acetophenone C1 Cs