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	hartrees
Energy at 0K	-44.615466
Energy at 298.15K	-44.621229
Nuclear repulsion energy	103.430884

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3256	3118	12.07
2	A₁	3230	3093	1.03
3	A₁	1614	1545	4.56
4	A₁	1456	1394	9.12
5	A₁	1208	1156	0.07
6	A₁	1166	1116	0.15
7	A₁	1082	1036	11.29
8	A₁	982	940	4.51
9	A₁	659	631	0.53
10	A₂	1052	1007	0.00
11	A₂	957	916	0.00
12	A₂	761	729	0.00
13	A₂	365	349	0.00
14	B₁	1006	963	0.04
15	B₁	789	755	70.38
16	B₁	368	352	10.47
17	B₂	3240	3102	30.90
18	B₂	3214	3078	1.27
19	B₂	1590	1523	4.46
20	B₂	1410	1350	23.07
21	B₂	1296	1241	2.74
22	B₂	1071	1026	0.48
23	B₂	1012	969	0.05
24	B₂	604	579	1.12

Atom	y (Å)	z (Å)
C1	0.705	1.205
C2	-0.705	1.205
C3	-1.348	-0.066
C4	1.348	-0.066
H5	1.288	2.126
H6	-1.288	2.126
H7	-2.436	-0.156
H8	2.436	-0.156
N9	0.685	-1.258
N10	-0.685	-1.258

	C1	C2	C3	C4	H5	H6	H7	H8	N9	N10
C1		1.4092	2.4151	1.4255	1.0900	2.1953	3.4233	2.2027	2.4632	2.8279
C2	1.4092		1.4255	2.4151	2.1953	1.0900	2.2027	3.4233	2.8279	2.4632
C3	2.4151	1.4255		2.6969	3.4292	2.1932	1.0917	3.7860	2.3563	1.3638
C4	1.4255	2.4151	2.6969		2.1932	3.4292	3.7860	1.0917	1.3638	2.3563
H5	1.0900	2.1953	3.4292	2.1932		2.5767	4.3682	2.5543	3.4372	3.9169
H6	2.1953	1.0900	2.1932	3.4292	2.5767		2.5543	4.3682	3.9169	3.4372
H7	3.4233	2.2027	1.0917	3.7860	4.3682	2.5543		4.8730	3.3098	2.0697
H8	2.2027	3.4233	3.7860	1.0917	2.5543	4.3682	4.8730		2.0697	3.3098
N9	2.4632	2.8279	2.3563	1.3638	3.4372	3.9169	3.3098	2.0697		1.3691
N10	2.8279	2.4632	1.3638	2.3563	3.9169	3.4372	2.0697	3.3098	1.3691

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C3	116.850	C1	C2	H6	122.379
C1	C4	H8	121.543	C1	C4	N9	124.020
C2	C1	C4	116.850	C2	C1	H5	122.379
C2	C3	H7	121.543	C2	C3	N10	124.020
C3	C2	H6	120.771	C3	N10	N9	119.131
C4	C1	H5	120.771	C4	N9	N10	119.131
H7	C3	N10	114.437	H8	C4	N9	114.437

All results from a given calculation for C₄H₄N₂ (Pyridazine)

using model chemistry: B1B95/CEP-31G

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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Number	Element	Mulliken
1	C	-0.192
2	C	-0.192
3	C	-0.470
4	C	-0.470
5	H	0.300
6	H	0.300
7	H	0.250
8	H	0.250
9	N	0.111
10	N	0.111

<r²>	0.000
(<r²>)^1/2	0.000

All results from a given calculation for C4H4N2 (Pyridazine)

using model chemistry: B1B95/CEP-31G

States and conformations

All results from a given calculation for C₄H₄N₂ (Pyridazine)