Abstract

Thirty bands of C<sub>2</sub>D<sub>2</sub> have been observed and measured between 1900 and 3300 cm<sup>-1</sup>. Twenty of these have been resolved well enough to permit extraction of rotational constants. The Δ<sub>2</sub><i>F</i> values up to <i>J</i>35 for three Σ<sub><i>g</i></sub> ground state bands were averaged and correlated with other data for a more reliable <i>B</i><sup>0</sup>=0.84794 ±0.00005 and <i>D</i><sup>0</sup>=7.85×10<sup>-7</sup>±0.4×10<sup>-7</sup>, where the indicated uncertainties are the probable errors of the coefficients. Better resolution and higher <i>J</i> values have reduced the uncertainty derived from other sources. The <i>l</i>-type doubling constants for ν<sub>4</sub><sup>1</sup> and ν<sub>5</sub><sup>1</sup> have been obtained from resolved <i>Q</i> branches and split <i>P</i> and <i>R</i> branches; they are <i>q</i><sub>4</sub> =0.00316 and <i>q</i><sub>5</sub>=0.00314 cm<sup>-1</sup>.

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  1. H. C. Allen, L. R. Blaine, and E. K. Plyler, J. Research Natl. Bur. Standards, 56, 279–283 (1956).
  2. B. D. Saksena, J. Chem. Phys. 20, 95 (1952).
  3. J. Overend and H. W. Thompson, Proc. Roy. Soc. (London) A232, 291–309 (1955).
  4. R. M. Talley and A. H. Nielsen, J. Chem. Phys. 22, 2030–2041 (1954).
  5. L. Krause and H. L. Welsh, Can. J. Phys. 34, 1431–1435 (1956).
  6. E. K. Plyler and E. D. Tidwell (to be published).
  7. E. K. Plyler, L. R. Blaine, and E. D. Tidwell, J. Research Natl. Bur. Standards, 55, 183 (1955).
  8. J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).
  9. E. D. Tidwell, E. K. Plyler, and W. S. Benedict, J. Opt. Soc. Am. 50, 1243 (1960).
  10. T. A. Wiggins, E. K. Plyler, and E. D. Tidwell, J. Opt. Soc. Am. (to be published).
  11. G. Herzberg, Infrared and Raman Spectra of Polyatomic Molecules (D. Van Nostrand, Inc., Princeton, New Jersey, 1945), p. 293.

Allen, H. C.

H. C. Allen, L. R. Blaine, and E. K. Plyler, J. Research Natl. Bur. Standards, 56, 279–283 (1956).

Benedict, W. S.

E. D. Tidwell, E. K. Plyler, and W. S. Benedict, J. Opt. Soc. Am. 50, 1243 (1960).

Blaine, L. R.

E. K. Plyler, L. R. Blaine, and E. D. Tidwell, J. Research Natl. Bur. Standards, 55, 183 (1955).

H. C. Allen, L. R. Blaine, and E. K. Plyler, J. Research Natl. Bur. Standards, 56, 279–283 (1956).

Guenther, A. H.

J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).

Herzberg, G.

G. Herzberg, Infrared and Raman Spectra of Polyatomic Molecules (D. Van Nostrand, Inc., Princeton, New Jersey, 1945), p. 293.

Krause, L.

L. Krause and H. L. Welsh, Can. J. Phys. 34, 1431–1435 (1956).

Nielsen, A. H.

R. M. Talley and A. H. Nielsen, J. Chem. Phys. 22, 2030–2041 (1954).

Overend, J.

J. Overend and H. W. Thompson, Proc. Roy. Soc. (London) A232, 291–309 (1955).

Plyler, E. K.

E. K. Plyler and E. D. Tidwell (to be published).

E. K. Plyler, L. R. Blaine, and E. D. Tidwell, J. Research Natl. Bur. Standards, 55, 183 (1955).

E. D. Tidwell, E. K. Plyler, and W. S. Benedict, J. Opt. Soc. Am. 50, 1243 (1960).

H. C. Allen, L. R. Blaine, and E. K. Plyler, J. Research Natl. Bur. Standards, 56, 279–283 (1956).

T. A. Wiggins, E. K. Plyler, and E. D. Tidwell, J. Opt. Soc. Am. (to be published).

Rank, D. H.

J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).

Saksena, B. D.

B. D. Saksena, J. Chem. Phys. 20, 95 (1952).

Shearer, J. N.

J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).

Talley, R. M.

R. M. Talley and A. H. Nielsen, J. Chem. Phys. 22, 2030–2041 (1954).

Thompson, H. W.

J. Overend and H. W. Thompson, Proc. Roy. Soc. (London) A232, 291–309 (1955).

Tidwell, E. D.

E. K. Plyler and E. D. Tidwell (to be published).

E. D. Tidwell, E. K. Plyler, and W. S. Benedict, J. Opt. Soc. Am. 50, 1243 (1960).

E. K. Plyler, L. R. Blaine, and E. D. Tidwell, J. Research Natl. Bur. Standards, 55, 183 (1955).

T. A. Wiggins, E. K. Plyler, and E. D. Tidwell, J. Opt. Soc. Am. (to be published).

Welsh, H. L.

L. Krause and H. L. Welsh, Can. J. Phys. 34, 1431–1435 (1956).

Wiggins, T. A.

T. A. Wiggins, E. K. Plyler, and E. D. Tidwell, J. Opt. Soc. Am. (to be published).

J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).

Other (11)

H. C. Allen, L. R. Blaine, and E. K. Plyler, J. Research Natl. Bur. Standards, 56, 279–283 (1956).

B. D. Saksena, J. Chem. Phys. 20, 95 (1952).

J. Overend and H. W. Thompson, Proc. Roy. Soc. (London) A232, 291–309 (1955).

R. M. Talley and A. H. Nielsen, J. Chem. Phys. 22, 2030–2041 (1954).

L. Krause and H. L. Welsh, Can. J. Phys. 34, 1431–1435 (1956).

E. K. Plyler and E. D. Tidwell (to be published).

E. K. Plyler, L. R. Blaine, and E. D. Tidwell, J. Research Natl. Bur. Standards, 55, 183 (1955).

J. N. Shearer, T. A. Wiggins, A. H. Guenther, and D. H. Rank, J. Chem. Phys. 25, 724 (1956).

E. D. Tidwell, E. K. Plyler, and W. S. Benedict, J. Opt. Soc. Am. 50, 1243 (1960).

T. A. Wiggins, E. K. Plyler, and E. D. Tidwell, J. Opt. Soc. Am. (to be published).

G. Herzberg, Infrared and Raman Spectra of Polyatomic Molecules (D. Van Nostrand, Inc., Princeton, New Jersey, 1945), p. 293.

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