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All results from a given calculation for C5H6 (Cyclopropylacetylene)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-31.192052
Energy at 298.15K-31.197298
HF Energy-30.745836
Nuclear repulsion energy75.349669
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3411 3329 39.26      
2 A 3222 3144 30.70      
3 A 3138 3063 10.19      
4 A 3103 3029 8.41      
5 A 2048 1998 5.76      
6 A 1516 1480 0.90      
7 A 1385 1352 5.53      
8 A 1212 1183 0.25      
9 A 1147 1120 2.36      
10 A 1139 1112 9.47      
11 A 941 918 18.50      
12 A 825 805 0.79      
13 A 746 728 5.42      
14 A 677 660 76.41      
15 A 482 470 7.33      
16 A 193 189 1.60      
17 A 3205 3128 0.18      
18 A 3093 3019 22.20      
19 A 1496 1461 2.14      
20 A 1230 1200 0.81      
21 A 1171 1143 2.97      
22 A 1136 1109 5.99      
23 A 925 903 1.14      
24 A 830 810 20.27      
25 A 632 617 80.80      
26 A 521 509 0.82      
27 A 206 201 1.65      

Unscaled Zero Point Vibrational Energy (zpe) 19815.1 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 19339.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G
ABC
0.50556 0.10606 0.10057

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.653 0.000
C2 -1.107 -0.317 0.000
H3 -0.306 1.702 0.000
C4 1.313 0.326 0.774
C5 1.313 0.326 -0.774
C6 -2.047 -1.136 0.000
H7 -2.852 -1.842 0.000
H8 1.808 1.152 1.288
H9 1.357 -0.639 1.280
H10 1.808 1.152 -1.288
H11 1.357 -0.639 -1.280

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 C6 H7 H8 H9 H10 H11
C11.47231.09251.55821.55822.71803.78902.27522.26932.27522.2693
C21.47232.17242.62082.62081.24582.31673.50942.79523.50942.7952
H31.09252.17242.26042.26043.32894.36342.53573.14382.53573.1438
C41.55822.62082.26041.54743.74434.75821.09141.09142.27522.2699
C51.55822.62082.26041.54743.74434.75822.27522.26991.09141.0914
C62.71801.24583.32893.74433.74431.07094.66363.66974.66363.6697
H73.78902.31674.36344.75824.75821.07095.68634.56015.68634.5601
H82.27523.50942.53571.09142.27524.66365.68631.84722.57553.1631
H92.26932.79523.14381.09142.26993.66974.56011.84723.16312.5599
H102.27523.50942.53572.27521.09144.66365.68632.57553.16311.8472
H112.26932.79523.14382.26991.09143.66974.56013.16312.55991.8472

picture of Cyclopropylacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C6 179.833 C1 C4 C5 60.229
C1 C4 H8 117.251 C1 C4 H9 116.740
C1 C5 C4 60.229 C1 C5 H10 117.251
C1 C5 H11 116.740 C2 C1 H3 114.976
C2 C1 C4 119.693 C2 C1 C5 119.693
C2 C6 H7 179.800 H3 C1 C4 115.911
H3 C1 C5 115.911 C4 C1 C5 59.543
C4 C5 H10 118.100 C4 C5 H11 117.635
C5 C4 H8 118.100 C5 C4 H9 117.635
H8 C4 H9 115.620 H10 C5 H11 115.620
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability