\\ Species Tag:        &   74002 & Name:&  C2H5OOCH    
\\ Version:            &       1 & & Ethyl formate, 
\\ Date:       &  Jan. 1996      & & trans and gauche 
\\ Contributor:&  J. C. Pearson  & & 
\\             &                 & &
\\ Lines Listed:       &   60671 & Q(300.0)=&   120097.057
\\ Freq. (GHz) $<$     &    2000 & Q(225.0)=&    79160.238
\\ Max. J:             &      70 & Q(150.0)=&    41231.375
\\ LOGSTR0=            &    -8.0 & Q(75.00)=&    12254.662
\\ LOGSTR1=            &    -8.0 & Q(37.50)=&     3632.345
\\ Isotope Corr.:      &     0.0 & Q(18.75)=&     1197.204
\\ Egy. (cm$^{-1}$) $>$&     0.0 & Q(9.375)=&      421.579
\\ $\mu_a$ = &  1.85             & A=&  17746.7
\\ $\mu_b$ = &  0.69             & B=&   2904.7
\\ $\mu_c$ = &  0.0              & C=&   2579.1
\headend

Ethyl formate is found in two conformers, trans and gauche. The trans form
is denoted by state 0 while the gauche form is state 1.  The dipoles and
rotational constants given are for the lower energy trans form which is about
60 $\pm$ 20 cm$^{-1}$ below the gauche form.  There is no evidence that
the two forms interact in the ground state.  Lines and dipoles were taken from:
J. M. Riveros and E. B. Wilson, 1967, J. Chem.\ Phys.\ {\bf 46}, 4605.
R. Meyer and E. B. Wilson, 1970, J. Chem.\ Phys.\ {\bf 53}, 3969.
J. Demaison, D. Boucher, J. Burie, and A. Dubrulle, 1984, Z. Naturforsch.\ {\bf
39a}, 560.

The gauche form has the following dipole moments $\mu_a$ = 1.44~D, $\mu_b$ =
1.05~D, $\mu_c$ = 0.25~D.