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Etude de la variation de la derive, induite par laser, en fonction de la largeur de bande de la source, pour une bande large necessaire pour eliminer le pompage optique hyperfin et exciter plus efficacement une grande asymetrie des vitesses

A T-shaped complex formed between acetylene and bromine monochloride is identified and characterised through its rotational spectrum, as detected in a mixture of the two components by using a fast-mixing nozzle incorporated into a pulsed-nozzle, F–T microwave spectrometer.

Pre-reactive complexes B ⋯ ClF, where B is ethyne or ethene, of C2v symmetry have been isolated in mixtures of B and ClF by using a fast-mixing nozzle in a pulsed-nozzle, Fourier-transform microwave spectrometer and characterised by their rotational spectra.

The rotational spectrum of a complex of C2v symmetry has been detected in a mixture of ethene and molecular chlorine by using a pulsed nozzle, Fourier-transform microwave spectrometer; the Cl2 molecule lies along the C2 axis of ethene that is perpendicular to the molecular plane and interacts only weakly with the π bond.