No abstract

No abstract

No abstract

Microwave spectra for five isotopomers of iron dinitrosyl dicarbonyl were measured in the 4-16-GHz range using a Flygare-Balle type spectrometer. Numerous b-dipole transitions were observed for Fe(N0)2(C0)2, Fe15NONO(C0)2, Fe( 15NO)2(C0)2, Fe(15N0)213COC0, and 54Fe( 15NO)2(C0)2. Measured rotational constants were analyzed to obtain an accurate gas-phase structure. Some of the structural parameters obtained are LN-Fe-N = 121 (2)',LC-Fe-C = 101(2)',r(Fe-N) = 1.69(2)A,r(Fe-C) = 1.85(2)A,LFe-N-O= 176(2)O, and LFe-C-O = 177(2)". N M R and IR data are also given. Nitrogen quadrupole coupling tensors were obtained from hyperfine structure on transitions for Fe(14NO)2(C0)2 and Fe(14NO)(1sNO)(CO)z. The z principal axis for the quadrupole tensor is rotated 62' away from the F e N bond direction and principal axis components are eQq,, = -1.5 MHz, eQqxx = 1.0 MHz and e&,,,, = 0.53 MHz.