4-Substituted 3,6-Bis(2-pyridyl)pyridazines: Silver(i) Complexes of 4-Cyano- and 4-(4-Bromophenyl)-3,6-bis(2-pyridyl)pyridazine and Pseudopolymorphs of 1,3,5-Tris{3,6-bis(2-pyridyl)pyridazin-4-yl}benzene

Edwin C. Constable; Catherine E. Housecroft; Markus Neuburger; Sébastien Reymann; Silvia Schaffner

doi:10.1071/CH08369

RESEARCH ARTICLE

4-Substituted 3,6-Bis(2-pyridyl)pyridazines: Silver(i) Complexes of 4-Cyano- and 4-(4-Bromophenyl)-3,6-bis(2-pyridyl)pyridazine and Pseudopolymorphs of 1,3,5-Tris{3,6-bis(2-pyridyl)pyridazin-4-yl}benzene

Edwin C. Constable ^A , Catherine E. Housecroft ^A ^B , Markus Neuburger ^A , Sébastien Reymann ^A and Silvia Schaffner ^A

+ Author Affiliations

- Author Affiliations

^A Department of Chemistry, University of Basel, Spitalstrasse 51, CH 4056-Basel, Switzerland.

^B Corresponding author. Email: catherine.housecroft@unibas.ch

Australian Journal of Chemistry 61(11) 847-853 https://doi.org/10.1071/CH08369
Submitted: 1 September 2008 Accepted: 22 September 2008 Published: 5 November 2008

Abstract

Metal:ligand complexes are crystallized from reaction mixtures of equimolar amounts of 4-cyano-3,6-bis(2-pyridyl)pyridazine 2 or 4-(4-bromophenyl)-3,6-bis(2-pyridyl)pyridazine 3 and silver(i) triflate. In [Ag₂(2)₂]²⁺, the two ligands adopt a head-to-tail arrangement, while a head-to-head motif is confirmed for the solid state structure of [Ag₂(3)₂]²⁺. In solution, one ligand environment is observed in each case. Silver(i) reacts with 1,3,5-tris{3,6-bis(2-pyridyl)pyridazin-4-yl}benzene 4 to give highly insoluble powders. The single crystal structures of the pseudopolymorphs (4)·Et₂O and 2(4)·2MeCN·H₂O are reported; in each structure, the ligand adopts the same conformation, derived from a C_s rather than C_3v model structure.

Acknowledgements

The authors thank the Swiss National Science Foundation and the University of Basel for financial support.

References

4-Substituted 3,6-Bis(2-pyridyl)pyridazines: Silver(i) Complexes of 4-Cyano- and 4-(4-Bromophenyl)-3,6-bis(2-pyridyl)pyridazine and Pseudopolymorphs of 1,3,5-Tris{3,6-bis(2-pyridyl)pyridazin-4-yl}benzene

Abstract

Acknowledgements

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