Issue 7, 1994

Clathrate compounds of cadmium cyanide and related hosts with cristobalite-like lattice structures

Abstract

The crystal structures of three series of clathrate compounds with organic guest molecules G have been determined, Cd(CN)2·G, [CdM(CN)4]·2G (M = Hg or Zn) and [NMe4·G][CuM(CN)4](M = Cd or Zn). The cubic Fd[3 with combining macron]munit-cell parameter for the first series (Z= 8) ranges from 12.647(6)Å for G = CHCl3 to 12.767(2)Å for CCl3CF3, depending on the molecular size and orientation of the guest in the cavity. In the second series the space group Fd[3 with combining macron]m is unchanged upon 50% substitution of Cd in the first with Hg or Zn owing to the random distribution of the tetrahedral centres; the lattice parameter varies little when M = Hg, but when M = Zn a= 12.243(2)Å, a decrease of 0.5 Å from the value for Cd(CN)2·CCl4. The anionic host in the third series accommodates the NMe4+ guest together with neutral CCl4; the lattice parameter of the cubic F[4 with combining macron]3munit cell decreases by ca. 0.6 Å in comparison with the values in the first two series. The X-ray data for 24 single crystals are discussed in terms of the crystallographic discrimination between C and N of the linking CN groups and the orientation of the guest molecules, in particular of the tetrahedral and pseudo-tetrahedral guest molecules, in the cavity approximating to a tetrahedron.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1994, 1029-1036

Clathrate compounds of cadmium cyanide and related hosts with cristobalite-like lattice structures

T. Kitazawa, S. Nishikiori, R. Kuroda and T. Iwamoto, J. Chem. Soc., Dalton Trans., 1994, 1029 DOI: 10.1039/DT9940001029

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements