Synthesis and Characterization of Some Thallium Cyclopentadienide Fused Ring Pyridazines

Abstract

Thallium cyclopentadiene (Cp) salts are important precursors for the synthesis of a variety of compounds having materials and commercial applications. The synthesis of 5,6-fused ring thallium Cp pyridazines 2a–d from previously reported 5,6-fused ring pyridazines is described herein. This route was quite general, and features an efficient and convenient two-step synthesis of a series of TlCp salts in a THF solution of thallium ethoxide. Full characterization of newly formed TlCp salts 3a–d are reported.

GRAPHICAL ABSTRACT

Keywords:

• Cyclopentadiene
• 1,2-diacylcyclopentadiene
• fulvenes
• pyridazines
• thallium

ACKNOWLEDGMENTS

We acknowledge our sources of financial support, including Western Kentucky University's Chemistry Department, their Office of Sponsored Programs, their Research and Creative Activities Program (RCAP) scholarship, and the WKU Advanced Materials Institute. In addition, other sources of support include Eastern Kentucky University's Department of Chemistry and the Center for Renewable and Alternative Fuel Technologies.

Notes

Note. NMR solvents: 2a, acetone-d ₆; 2b, CDCl₃; 3a–d, DMSO-d ₆.