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 C8H18 (Octane)

using model chemistry: B97D3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at B97D3/6-31+G**
 hartrees
Energy at 0K-315.537687
Energy at 298.15K-315.556800
HF Energy-315.537687
Nuclear repulsion energy372.567710
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 B97D3/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3053 3001 0.00      
2 Ag 2976 2925 0.00      
3 Ag 2967 2916 0.00      
4 Ag 2954 2904 0.00      
5 Ag 2953 2902 0.00      
6 Ag 1485 1460 0.00      
7 Ag 1473 1448 0.00      
8 Ag 1464 1439 0.00      
9 Ag 1460 1435 0.00      
10 Ag 1387 1363 0.00      
11 Ag 1375 1351 0.00      
12 Ag 1360 1337 0.00      
13 Ag 1278 1256 0.00      
14 Ag 1131 1112 0.00      
15 Ag 1056 1038 0.00      
16 Ag 1039 1021 0.00      
17 Ag 986 969 0.00      
18 Ag 889 874 0.00      
19 Ag 466 458 0.00      
20 Ag 271 266 0.00      
21 Ag 192 188 0.00      
22 Au 3049 2997 163.50      
23 Au 3021 2969 160.42      
24 Au 3001 2949 1.78      
25 Au 2981 2929 0.10      
26 Au 1476 1450 15.85      
27 Au 1318 1296 0.69      
28 Au 1297 1274 0.62      
29 Au 1212 1191 0.00      
30 Au 1025 1008 0.20      
31 Au 868 853 0.71      
32 Au 744 731 1.16      
33 Au 719 707 4.50      
34 Au 238 234 0.00      
35 Au 153 151 0.00      
36 Au 54 53 0.00      
37 Au 35 34 0.01      
38 Bg 3049 2997 0.00      
39 Bg 3011 2960 0.00      
40 Bg 2989 2938 0.00      
41 Bg 2977 2926 0.00      
42 Bg 1476 1450 0.00      
43 Bg 1319 1296 0.00      
44 Bg 1306 1284 0.00      
45 Bg 1258 1237 0.00      
46 Bg 1179 1159 0.00      
47 Bg 950 934 0.00      
48 Bg 794 780 0.00      
49 Bg 723 711 0.00      
50 Bg 241 237 0.00      
51 Bg 128 126 0.00      
52 Bg 102 100 0.00      
53 Bu 3053 3001 106.66      
54 Bu 2976 2925 134.91      
55 Bu 2970 2919 210.34      
56 Bu 2960 2909 6.78      
57 Bu 2951 2900 1.90      
58 Bu 1489 1463 9.80      
59 Bu 1479 1454 2.26      
60 Bu 1467 1441 1.01      
61 Bu 1459 1434 0.05      
62 Bu 1385 1362 3.38      
63 Bu 1376 1353 2.49      
64 Bu 1325 1302 2.48      
65 Bu 1227 1206 3.55      
66 Bu 1079 1061 4.64      
67 Bu 1052 1034 0.25      
68 Bu 998 981 0.65      
69 Bu 873 858 2.93      
70 Bu 465 457 0.16      
71 Bu 334 328 0.02      
72 Bu 76 75 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 52950.3 cm-1
Scaled (by 0.9828) Zero Point Vibrational Energy (zpe) 52039.5 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 B97D3/6-31+G**
ABC
0.35550 0.01615 0.01581

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-31+G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.768 0.000
C2 -0.000 -0.768 0.000
C3 -1.407 1.382 0.000
C4 1.407 -1.382 0.000
C5 -1.407 2.918 0.000
C6 1.407 -2.918 0.000
C7 -2.818 3.522 0.000
C8 2.818 -3.522 0.000
H9 0.556 1.131 0.882
H10 0.556 1.131 -0.882
H11 -0.556 -1.131 0.882
H12 -0.556 -1.131 -0.882
H13 -1.963 1.019 -0.882
H14 -1.963 1.019 0.882
H15 1.963 -1.019 -0.882
H16 1.963 -1.019 0.882
H17 -0.851 3.279 0.881
H18 -0.851 3.279 -0.881
H19 0.851 -3.279 0.881
H20 0.851 -3.279 -0.881
H21 -2.787 4.621 0.000
H22 -3.385 3.203 -0.887
H23 -3.385 3.203 0.887
H24 2.787 -4.621 0.000
H25 3.385 -3.203 -0.887
H26 3.385 -3.203 0.887

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16 H17 H18 H19 H20 H21 H22 H23 H24 H25 H26
C11.53571.53552.56912.57003.94543.94085.13271.10351.10352.16632.16632.16682.16682.79682.79682.79422.79424.22824.22824.75574.26324.26326.06685.29215.2921
C21.53572.56911.53553.94542.57005.13273.94082.16632.16631.10351.10352.79682.79682.16682.16684.22824.22822.79422.79426.06685.29215.29214.75574.26324.2632
C31.53552.56913.94441.53635.13912.56366.47322.16632.16632.79592.79591.10361.10364.23074.23072.16452.16455.25365.25363.52092.83092.83097.32306.69086.6908
C42.56911.53553.94445.13911.53636.47322.56362.79592.79592.16632.16634.23074.23071.10361.10365.25365.25362.16452.16457.32306.69086.69083.52092.83092.8309
C52.57003.94541.53635.13916.47951.53487.70272.79712.79714.23074.23072.16642.16645.25705.25701.10271.10276.65456.65452.19182.18622.18628.62747.82407.8240
C63.94542.57005.13911.53636.47957.70271.53484.23074.23072.79712.79715.25705.25702.16642.16646.65456.65451.10271.10278.62747.82407.82402.19182.18622.1862
C73.94085.13272.56366.47321.53487.70279.02174.22824.22825.24875.24872.78832.78836.65276.65272.16912.16917.77797.77791.09931.10031.10039.88599.19179.1917
C85.13273.94086.47322.56367.70271.53489.02175.24875.24874.22824.22826.65276.65272.78832.78837.77797.77792.16912.16919.88599.19179.19171.09931.10031.1003
H91.10352.16632.16632.79592.79714.23074.22825.24871.76302.52073.07613.07662.52143.11632.56972.56763.11444.42014.75864.91244.79054.45196.23255.46935.1754
H101.10352.16632.16632.79592.79714.23074.22825.24871.76303.07612.52072.52143.07662.56973.11633.11442.56764.75864.42014.91244.45194.79056.23255.17545.4693
H112.16631.10352.79592.16634.23072.79715.24874.22822.52073.07611.76303.11632.56973.07662.52144.42014.75862.56763.11446.23255.46935.17544.91244.79054.4519
H122.16631.10352.79592.16634.23072.79715.24874.22823.07612.52071.76302.56973.11632.52143.07664.75864.42013.11442.56766.23255.17545.46934.91244.45194.7905
H132.16682.79681.10364.23072.16645.25702.78836.65273.07662.52143.11632.56971.76304.42354.76193.07442.51895.43135.13733.79882.60573.14937.42646.81337.0392
H142.16682.79681.10364.23072.16645.25702.78836.65272.52143.07662.56973.11631.76304.76194.42352.51893.07445.13735.43133.79883.14932.60577.42647.03926.8133
H152.79682.16684.23071.10365.25702.16646.65272.78833.11632.56973.07662.52144.42354.76191.76305.43135.13733.07442.51897.42646.81337.03923.79882.60573.1493
H162.79682.16684.23071.10365.25702.16646.65272.78832.56973.11632.52143.07664.76194.42351.76305.13735.43132.51893.07447.42647.03926.81333.79883.14932.6057
H172.79424.22822.16455.25361.10276.65452.16917.77792.56763.11444.42014.75863.07442.51895.43135.13731.76236.77547.00092.51513.09092.53508.74217.94247.7430
H182.79424.22822.16455.25361.10276.65452.16917.77793.11442.56764.75864.42012.51893.07445.13735.43131.76237.00096.77542.51512.53503.09098.74217.74307.9424
H194.22822.79425.25362.16456.65451.10277.77792.16914.42014.75862.56763.11445.43135.13733.07442.51896.77547.00091.76238.74217.94247.74302.51513.09092.5350
H204.22822.79425.25362.16456.65451.10277.77792.16914.75864.42013.11442.56765.13735.43132.51893.07447.00096.77541.76238.74217.74307.94242.51512.53503.0909
H214.75576.06683.52097.32302.19188.62741.09939.88594.91244.91246.23256.23253.79883.79887.42647.42642.51512.51518.74218.74211.77671.776710.793010.004510.0045
H224.26325.29212.83096.69082.18627.82401.10039.19174.79054.45195.46935.17542.60573.14936.81337.03923.09092.53507.94247.74301.77671.774610.00459.31969.4870
H234.26325.29212.83096.69082.18627.82401.10039.19174.45194.79055.17545.46933.14932.60577.03926.81332.53503.09097.74307.94241.77671.774610.00459.48709.3196
H246.06684.75577.32303.52098.62742.19189.88591.09936.23256.23254.91244.91247.42647.42643.79883.79888.74218.74212.51512.515110.793010.004510.00451.77671.7767
H255.29214.26326.69082.83097.82402.18629.19171.10035.46935.17544.79054.45196.81337.03922.60573.14937.94247.74303.09092.535010.00459.31969.48701.77671.7746
H265.29214.26326.69082.83097.82402.18629.19171.10035.17545.46934.45194.79057.03926.81333.14932.60577.74307.94242.53503.090910.00459.48709.31961.77671.7746

picture of Octane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 114.469 C1 C2 H11 108.958
C1 C2 H12 108.958 C1 C3 C5 114.466
C1 C3 H13 109.035 C1 C3 H14 109.035
C2 C1 C3 114.469 C2 C1 H9 108.958
C2 C1 H10 108.958 C2 C4 C6 114.466
C2 C4 H15 109.035 C2 C4 H16 109.035
C3 C1 H9 108.977 C3 C1 H10 108.977
C3 C5 C7 113.932 C3 C5 H17 108.820
C3 C5 H18 108.820 C4 C2 H11 108.977
C4 C2 H12 108.977 C4 C6 C8 113.932
C4 C6 H19 108.820 C4 C6 H20 108.820
C5 C3 H13 108.911 C5 C3 H14 108.911
C5 C7 H21 112.115 C5 C7 H22 111.104
C5 C7 H23 111.104 C6 C4 H15 108.911
C6 C4 H16 108.911 C6 C8 H24 112.115
C6 C8 H25 111.104 C6 C8 H26 111.104
C7 C5 H17 109.439 C7 C5 H18 109.439
C8 C6 H19 109.439 C8 C6 H20 109.439
H9 C1 H10 106.179 H11 C2 H12 106.179
H13 C3 H14 106.157 H15 C4 H16 106.157
H17 C5 H18 106.096 H19 C6 H20 106.096
H21 C7 H22 107.473 H21 C7 H23 107.473
H22 C7 H23 107.347 H24 C8 H25 107.473
H24 C8 H26 107.473 H25 C8 H26 107.347
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.201      
2 C -0.201      
3 C -0.280      
4 C -0.280      
5 C -0.143      
6 C -0.143      
7 C -0.687      
8 C -0.687      
9 H 0.143      
10 H 0.143      
11 H 0.143      
12 H 0.143      
13 H 0.142      
14 H 0.142      
15 H 0.142      
16 H 0.142      
17 H 0.145      
18 H 0.145      
19 H 0.145      
20 H 0.145      
21 H 0.151      
22 H 0.151      
23 H 0.151      
24 H 0.151      
25 H 0.151      
26 H 0.151      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -57.493 0.577 0.000
y 0.577 -56.601 0.000
z 0.000 0.000 -54.650
Traceless
 xyz
x -1.867 0.577 0.000
y 0.577 -0.530 0.000
z 0.000 0.000 2.397
Polar
3z2-r24.793
x2-y2-0.891
xy0.577
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 15.447 -2.309 0.000
y -2.309 16.757 0.000
z 0.000 0.000 12.524


<r2> (average value of r2) Å2
<r2> 688.403
(<r2>)1/2 26.237