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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XOlder CCCBDB versions
XIIGeometries
XIII Vibrations
XIVReaction data
XVEntropy data
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XVIIIon data
XVIIIBad calculations
XIXIndex of properties
XXH-bond dimers
XXIOddities

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II.A.3. (XII.A.1.)

Listing of experimental geometry data for CH(CN)3 (tricyanomethane)

Rotational Constants (cm-1)


See section I.F.4 to change rotational constant units
A B C
  0.09557  
Rotational Constants from 1977Bak/Sva:153-156
Calculated rotational constants for CH(CN)3 (tricyanomethane).

Point Group C3v

Internal coordinates

(distances (r) in Å) (angles (a) in degrees) (dihedrals (d) in degrees)
Description Value Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCN 1.158 3 6 1977Bak/Sva:153-156
rCC 1.460 1 3 1977Bak/Sva:153-156
rCH 1.100 1 2 1977Bak/Sva:153-156
aHCC 106.59 2 1 3 1977Bak/Sva:153-156
aCCN 177 1 3 6 1977Bak/Sva:153-156
picture of tricyanomethane

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 1
C-C 3
C#N 3

Atom x (Å) y (Å) z (Å)
C1 0.0000 0.0000 0.4537
H2 0.0000 0.0000 1.5537
C3 0.0000 1.3992 0.0369
C4 1.2118 -0.6996 0.0369
C5 -1.2118 -0.6996 0.0369
N6 0.0000 2.5248 -0.2352
N7 2.1865 -1.2624 -0.2352
N8 -2.1865 -1.2624 -0.2352

Atom - Atom Distances (Å)

  C1 H2 C3 C4 C5 N6 N7 N8
C11.10001.46001.46001.46002.61712.61712.6171
H21.10002.06372.06372.06373.09433.09433.0943
C31.46002.06372.42352.42351.15803.45533.4553
C41.46002.06372.42352.42353.45531.15803.4553
C51.46002.06372.42352.42353.45533.45531.1580
N62.61713.09431.15803.45533.45534.37314.3731
N72.61713.09433.45531.15803.45534.37314.3731
N82.61713.09433.45533.45531.15804.37314.3731

Calculated geometries for CH(CN)3 (tricyanomethane).
References
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squib reference DOI
1977Bak/Sva:153-156 R Bak, H Svanholt "THE EXISTENCE OF GASEOUS CYANOFORM AS OBSERVED BY MICROWAVE SPECTRA" Journal of Molecular Structure. 37 (1977) 153-156 10.1016/0022-2860(77)87015-4

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