Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Metal-betaine interactions. II. Crystal structures of catena-dichloro(betaine)cadmium(II) and dimeric diaquabis(betaine)tetrachlorodicadmium(II)


Two cadmium(II) complexes of betaine (BET) have been prepared and characterized by X-ray crystallography. [Cd(BET) (μ−Cl)2] (1), is a one-dimensional polymer in which each cadmium atom is coordinated by two pairs of bridging chlorine atoms [Cd-Cl=2.631(2), 2.614(2) Å] and two oxygen atoms from different bridging carboxylate groups [Cd-O=2.291(6), 2.329(6) Å] in the form of a compressed octahedron. [Cd(BET)(H2O)Cl(μ−Cl)]2 (2) is a dimer with each cadmium atom in a distorted octahedral coordination environment, being surrounded by a chelating bidentate carboxylate group [2.480(2), 2.332(3) Å], one aqua ligand [2.364(3) Å], two bridging chlorine atoms [2.659(1), 2.557(1) Å], and one terminal chlorine atom [2.480(1) Å].

This is a preview of subscription content, log in to check access.


  1. Chen, X.-M., and Mak, T. C. W. (1991)J. Cryst. Spectrosc. Res. 21, 21–25.

  2. Deacon, G. B., and Philips, R. J. (1980)Coord. Chem. Rev. 33, 227–250.

  3. Diamond, R. (1969)Acta Crystallogr. A 25, 43–55.

  4. Flook, R. J., Freeman, H. C., Moore, C. J., and Scudder, M. L. (1973)J. Chem. Soc. Chem. Comm., 753–754.

  5. Harmon, K. M., and Avci, G. F. (1984)J. Mol. Struct. 117, 295.

  6. Harrison, W. and Trotter, J. (1972)J. Chem. Soc. Dalton Trans., 956–960.

  7. Kopfmann G., and Huber, R. (1968)Acta Crystallogr. A 24, 348–351.

  8. International Tables for X-Ray Crystallography (1974) Vol. IV (Kynoch Press, Birmingham), pp. 55, 99, 149. [Now distributed by Kluwer Academic Publishers, Dordrecht, The Netherlands].

  9. Mak, T. C. W., Yip, W. H., O'Reilly, E. J., Smith, G., and Kennard, C. H. L. (1985)Inorg. Chim. Acta 100, 267–273.

  10. Nadzhafov, G. N., Shnulin, A. N., Mamcdov, Kh.S., and Shi'nikov, V. I. (1982)Koor. Chim. 8, 1276; throughChem. Abstr. 97 (1982) 227906.

  11. Oldham, C. (1987) InComprehensive Coordination Chemistry, G. Wilkinson, R. D. Gillard, and J. A. McCleverty, (eds.) (Pergamon Press, Oxford), Vol. 2, pp. 435–442.

  12. Sheldrick, G. M. (1982) InComputational Crystallography, D. Sayre (ed.) (Oxford University Press, New York), pp. 506–514.

  13. Sheldrick, G. M. (1985) InCrystallographic Computing 3: Data Collection, Structure Determination, Proteins, and Databases, G. M. Sheldrick, C. Krüger, and R. Goddard (eds.) (Oxford University Press, New York), pp. 175–189.

  14. Smith, G., O'Reilly, E. J., Kennard, C. H., Mak, T. C. W., Yip, W. H., and Chan, W. H. (1988)Aust. J. Chem. 41, 1769–72.

  15. Sparks, R. A. (1976) InCrystallographic Computing Techniques, F. R. Ahmed (ed.) (Munksgaard, Copenhagen), pp. 452–467.

  16. Thanmaniwong, Theo., Akimnov, V. M., Andrieanov, V. G., Struchkov, Yu. T., and Molodkin, A. K. (1984)Zh. Neorg. Khim. 29, 1033–7; throughChem. Abstr. 100 (1984), 219406.

  17. Yukawa, Y., Inomata, Y., Takeuchi, T., Shimoi, M., and Ouchi, A. (1982)Bull. Chem. Soc. Jpn. 55, 3135.

  18. Yukawa, Y., Inomata, Y., and Takeuchi, T. (1983)Bull. Chem. Soc. Jpn. 56, 2125–2128.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Chen, X.-., Mak, T.C.W. Metal-betaine interactions. II. Crystal structures of catena-dichloro(betaine)cadmium(II) and dimeric diaquabis(betaine)tetrachlorodicadmium(II). Journal of Crystallographic and Spectroscopic Research 21, 27–32 (1991).

Download citation


  • Cadmium
  • Carboxylate Group
  • Betaine
  • Chlorine Atom
  • Octahedral Coordination