| High resolution rotational spectra of ('10)BH(,3)CO, ('11)BH(,3)CO, ('11)BD(,3)CO, PH(,2)D and CD(,3)CN were studied to obtain information concerning the electronic and magnetic properties of these molecules. From the analysis of the hyperfine structure of the rotational spectra of the molecules the following constants were determined: rotational constants (B(,0)), nuclear quadrupole coupling constants (eOq {x}, spin-spin constants D (X-Y) and spin rotation constants (C{x}). The two instruments used in these experiments were a Stark modulated microwave spectrometer and a molecular beam maser spectrometer.;The J = 0 to 1, F(,1) = 3 to 3 and F(,1) = 3 to 4 transitions of ('10)BH(,3)CO were studied. The molecular constants in KHz which were derived from the spectral analysis were: B(,0) = 8980060.3 (+OR-) 1.0, eQq(,aa) (('10)B) = 3463.- (+OR-) 8.0, C(('10)B) = .2 (+OR-) .2, D(('10)B-H) = -2.8 (+OR-) .2, D(H-H) = -7.2 (+OR-) .5 and C(H) = 0.0 (+OR-) .7.;All three of the F(,1) components of the J = 0 to 1 rotational transition of ('11)BH(,3)CO were observed. The molecular constants in KHz which were obtained from the data analysis were: B(,0) = 8657333.8 (+OR-) .6, eQq(,aa) (('11)B) = 1661.9 (+OR-) 2.3, C(('11)B) = .7 (+OR-) .3, D(('11)B-H) = 8.3 (+OR-) .4, D(H-H) = -6.8 (+OR-) .2 and C(H) = .4 (+OR-) .4.;Only spectra of the J = 0 to 1, F(,1) = 3/2 to 3/2 transition of ('11)BD(,3)CO were obtained. From the analysis of the spectra the following molecular constants were derived: eQq(,aa)(D) = -48.5 (+OR-) 2.3, eQq(,zz)(D) = 116.9 (+OR-) 5.4, C(D) = 0.0 (+OR-) .8 and D(('11)B-H) = -1.2 (+OR-) .3.;The investigation of the 4(,04) to 4(,14) and 1(,11) to 1(,01) rotational transitions of PH(,2)D was unsuccessful in determining any molecular parameters. The spectra of the 4(,04) to 4(,14) rotational transition were not amenable to analysis and no spectra were obtained for the 1(,11) to 1(,01) rotational transitions.;The three components of the J = 0 to 1 rotational transitions of CD(,3)CN were studied with the maser in the two cavity configuration. The constants in KHz which were determined were: B(,0) = 7857978.7 (+OR-) .1, eQq(,aa)(N) = -4229.2 (+OR-) .6, eQq(,aa)(D) = -55.1 (+OR-) .4, eQq(,zz)(D) = 165.5 (+OR-) 5.0, C(,N) = 1.7 (+OR-) .1 and C(,D) = 0.0 (+OR-) .03. |
