Synthesis and characterization of 1,3,5-triaza-7-phosphaadamantane based water-soluble ligands

Abstract

Four new water-soluble bidentate ligands, namely, (cyclopentadienyl)ethyl-1,3,5-triaza-7-phosphadamantane (1), 1,2-bis-(1,3,5-triaza-7-phosphaadamantan-6-yl) ethane (2), 1,3-bis-(1,3,5-triaza-7-phosphaaadamantan-6-yl) propane (3) and 1,4-bis-(1,3,5-triaza-7-phosphaadamantan-6-yl) butane (4) have been synthesized and characterized by multi-nuclear NMR (¹H, ¹³C and ³¹P), elemental analysis and mass spectrometry. Compound 1 was synthesized by using two different synthetic routes in excellent yields and is also the first example of water-soluble chelating cyclopentadienyl ligand containing 1,3,5-triaza-7-phosphaadamantane.

GRAPHICAL ABSTRACT

Keywords:

• Water-soluble ligands
• synthesis
• spectroscopic characterization

Acknowledgements

We acknowledge the financial support from Science and Engineering Research Board of India in the form of a Start-Up Research Grant (Young Scientists, no. 58/FT/C5-092/2014) and Department of Science Technology under Women-Scientist Scheme WOS-A (SR/WOS-A/CS-1035/2015).