Rotational spectroscopy can also give extremely accurate values of bond lengths.

Rotational spectroscopy has primarily been used to investigate fundamental aspects of molecular physics.

Further in rotational spectroscopy this model may be used as an approximation of rotational energy levels.

The approximate factor 2.9 was first experimentally determined, then measured with rotational spectroscopy in different clusters.

Due to its lack of a permanent dipole moment, pure rotational spectroscopy of H is impossible.

Some of these reactive carbon oxides were detected within molecular clouds in the interstellar medium by rotational spectroscopy.

It is mainly known by its involvement in experiments with microwave spectroscopy, rotational spectroscopy and photodissociation.

Rotational spectroscopy uses electromagnetic radiation in the wavelength range from 0.1 to 0.5 terahertz (THz).

This applies to rotational spectroscopy, rotational-vibrational spectroscopy and vibronic spectroscopy.

An important application of rotational spectroscopy is in exploration of the chemical composition of the interstellar medium using radio telescopes.

Theoretical chemistry predicts that it is a stable compound, but its existence has only been observed indirectly, e.g. by rotational spectroscopy and mass spectrometry.

This forms spectral lines at that frequency which can be detected with a spectrometer, as in Rotational spectroscopy or Raman spectroscopy.

For a given vibrational transition, the same theoretical treatment as for pure rotational spectroscopy gives the rotational quantum numbers, energy levels and selection rules.

Microwave radiation is also used to perform rotational spectroscopy and can be combined with electrochemistry as in microwave enhanced electrochemistry.

Current (as of 2008) trends in organic chemistry include chiral synthesis, green chemistry, microwave chemistry, fullerenes and rotational spectroscopy.

Rotational spectroscopy is concerned with the measurement of the energies of transitions between quantized rotational states of molecules in the gas phase.

Detections of c-CH in the ISM rely on observations of molecular transitions using rotational spectroscopy.

The gas phase structure of methanesulfenic acid was found by microwave spectroscopy (rotational spectroscopy) to be CH-S-O-H.

Much of current understanding of the nature of weak molecular interactions such as van der Waals, hydrogen and halogen bonds has been established through rotational spectroscopy.

Rotations are collective motions of the atomic nuclei and typically lead to spectra in the microwave and millimeter-wave spectral regions; rotational spectroscopy and microwave spectroscopy are synonymous.

For rotational spectroscopy, molecules are classified according to symmetry into spherical top, linear and symmetric top; analytical expressions can be derived for the rotational energy terms of these molecules.

Data for the ground state can also be obtained by vibrational or pure rotational spectroscopy, but data for the excited state can only be obtained from the analysis of vibronic spectra.

Klemperer foresaw that he could synthesize dimers of almost any pair of molecules he could dilute in his beam and study their minimum energy structure in exquisite detail by rotational spectroscopy.

The appearance of rotational fine structure is determined by the symmetry of the molecular rotors which are classified, in the same way as for pure rotational spectroscopy, into linear molecules, spherical-, symmetric- and asymmetric- rotor classes.

One of the reasons why this detection was controversial is that although radio (and some other methods like rotational spectroscopy) are good for the identification of simple species with large dipole moments, they are less sensitive to more complex molecules, even something relatively small like amino acids.