return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Compare Angles

18 10 26 16 25

Click on entry for experimental details.
Species Name Experimental Angle Calculated Angle Difference
NH2CONH2 Urea 119.2 121.7 -2.5
NH2CONH2 Urea 112.8 116.2 -3.5
CH3CSNH2 Ethanethioamide 124.0 122.2 1.8
CH3CSNH2 Ethanethioamide 114.4 119.4 -5.0
CH3NH2 methyl amine 111.0 113.7 -2.7
CH3CH2NH2 Ethylamine 111.1 113.3 -2.2
CHONH2 formamide 118.5 121.7 -3.2
CHONH2 formamide 120.0 119.3 0.7
HNCO Isocyanic acid 123.9 137.8 -13.9
C4H5N Pyrrole 125.1 125.2 -0.1
CHSNH2 thioformamide 117.9 122.0 -4.1
CHSNH2 thioformamide 120.4 119.6 0.8
HNCNH diiminomethane 118.6 125.4 -6.8
CH2NH Methanimine 110.5 113.6 -3.1
HNCS Isothiocyanic acid 131.7 151.4 -19.7
HNC hydrogen isocyanide 180.0 180.0 0.0

QCISD/6-31G for aHNC

Histogram of angle differences (in degrees) vs number of species


Differences greater than 4 are in the 4 bin. Differences less than -20 are in the -20 bin.

histogram chart 10
histogram chart 8
histogram chart 6
histogram chart 4
histogram chart 2 histogram chart histogram chart histogram chart
histogram chart 0 histogram chart histogram chart histogram chart histogram chart histogram chart histogram chart histogram chart
-20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4
Angle difference calc. - exp. (degrees)

  Species Name Difference (degrees)
Most negative difference HNCS Isothiocyanic acid -19.7
Most positive difference CH3CSNH2 Ethanethioamide 1.8