return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C5H10O (2-methylbutyraldehyde)

using model chemistry: CCSD(T)=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-270.959319
Energy at 298.15K 
HF Energy-270.016810
Nuclear repulsion energy239.352231
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 CCSD(T)=FULL/6-31G*
Rotational Constants (cm-1) from geometry optimized at CCSD(T)=FULL/6-31G*
ABC
0.23436 0.06973 0.05833

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.370 -0.704 0.220
C2 -0.081 0.073 0.408
C3 1.056 -0.684 -0.305
C4 2.451 -0.137 0.007
C5 -0.239 1.522 -0.048
O6 -2.396 -0.246 -0.260
H7 -1.330 -1.769 0.546
H8 0.133 0.045 1.493
H9 1.016 -1.747 -0.016
H10 0.875 -0.650 -1.391
H11 3.224 -0.746 -0.479
H12 2.569 0.895 -0.346
H13 2.641 -0.149 1.089
H14 -0.418 1.564 -1.130
H15 -1.097 1.992 0.446
H16 0.658 2.109 0.181

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.51662.48253.86842.51051.22161.11522.10762.61452.76394.64724.28844.14142.80522.71903.4677
C21.51661.54152.57191.52682.43052.23031.10672.16722.16203.51882.87502.81492.16802.17182.1777
C32.48251.54151.53032.57163.48032.75632.14881.10211.10172.17572.18732.17762.81233.51672.8635
C43.86842.57191.53033.16074.85534.15352.75892.15732.16811.09781.09681.09893.52344.16092.8790
C52.51051.52682.57163.16072.79693.51772.16703.50192.78634.16222.89273.51871.09761.09611.0964
O61.22162.43053.48034.85532.79692.02613.09153.73513.48465.64665.09515.21552.81872.68273.8818
H71.11522.23032.75634.15353.51772.02612.51602.41243.14174.77934.80604.32343.84063.77004.3735
H82.10761.10672.14882.75892.16703.09152.51602.50363.05823.75053.16802.54723.08102.53052.5017
H92.61452.16721.10212.15733.50193.73512.41242.50361.76492.46893.08272.53353.77614.31993.8780
H102.76392.16201.10172.16812.78633.48463.14173.05821.76492.52192.51963.08572.57703.77463.1830
H114.64723.51882.17571.09784.16225.64664.77933.75052.46892.52191.77181.77624.36175.19873.8951
H124.28842.87502.18731.09682.89275.09514.80603.16803.08272.51961.77181.77613.15983.90792.3246
H134.14142.81492.17761.09893.51875.21554.32342.54722.53353.08571.77621.77614.14934.35583.1397
H142.80522.16802.81233.52341.09762.81873.84063.08103.77612.57704.36173.15984.14931.76901.7814
H152.71902.17183.51674.16091.09612.68273.77002.53054.31993.77465.19873.90794.35581.76901.7788
H163.46772.17772.86352.87901.09643.88184.37352.50173.87803.18303.89512.32463.13971.78141.7788

picture of 2-methylbutyraldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 108.537 C1 C2 C5 111.155
C1 C2 H8 105.856 C2 C1 O6 124.805
C2 C1 H7 115.023 C2 C3 C4 113.706
C2 C3 H9 108.995 C2 C3 H10 108.615
C2 C5 H14 110.327 C2 C5 H15 110.715
C2 C5 H16 111.170 C3 C2 C5 113.878
C3 C2 H8 107.330 C3 C4 H11 110.687
C3 C4 H12 111.676 C3 C4 H13 110.769
C4 C3 H9 108.994 C4 C3 H10 109.854
C5 C2 H8 109.709 O6 C1 H7 120.167
H9 C3 H10 106.419 H11 C4 H12 107.674
H11 C4 H13 107.909 H12 C4 H13 107.975
H14 C5 H15 107.490 H14 C5 H16 108.577
H15 C5 H16 108.452
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability