C4H10   -   Isobutane

Molecular constants for the isobutane species: (CH3)3CH, (CH3)313CH, and (CH3)3CD
Parameter (CH3)3CH Ref. (CH3)313CH (CH3)3CD Ref.
B0 [MHz] 7789.45(3) 58010 7773.88(3) 7540.82(2) 60010
Bτa [MHz] 7782.84(5)  
Bτe [MHz] 7774.67(5)
Bδa [MHz] 7790.3(3)
Bδe [MHz] 7795.0(3)
DJ [MHz] 0.011(4)
qℓ(τe) [MHz] 21.0
qℓ(δe) [MHz] 17.
µc [C · m]
    µc [D]		 0.440(3) x 10-30
    0.132(1)		   0.470(7) x 10-30
    0.141(2)		 60010

 

 

Rotational constants for asymmetric-rotor species of isobutane
Parameter 13CH3(CH3)2CH sym-CH2D(CH3)2CH asy-CH2D(CH3)2CH Ref.
A [MHz] 7788.28(5) 7629.15(20) 7782.70(3) 60010
B [MHz] 7546.10(5) 7378.95(40) 7259.37(3)
C [MHz] 4431.(45) 4466.(140) 4319.(7)

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