CC BY 4.0 · SynOpen 2024; 08(01): 63-67
DOI: 10.1055/a-2263-8235
paper

Cobalt–Magnesium and Cobalt–Calcium Heterotrimetallic Dinitrogen Complexes

Jocelyn Polanco
,
Theresa Knoell
,
Abolghasem Gus Bakhoda
This work was supported by the instrumentation provided through the National Science Foundation (NSF) under Grant No. 0923051. A.B. gratefully acknowledges financial support of Towson University through research grants from the Jess and Mildred Fisher College of Science and Mathematics (FCSM).


In memory of Davood Amiri (Feb 1974–Apr 2022)

Abstract

We report the use of alkaline earth metals magnesium and calcium for the reduction of the cobalt(II) complex [ i Pr2NN]Co(μ-Cl)2Li(thf)2 [ i Pr2NN = 2,4-bis(2,6-diisopropylphenylimido)pentyl] that resulted in heterotrimetallic dinitrogen complexes with a rare example of a [Co–N2–M–N2–Co] core where M = Mg and Ca. The dinitrogen ligands in these new complexes showed weakened N–N bonds, as judged by infrared spectroscopy, and the crystal structures of the complexes were illustrated by X-ray crystallography. These cobalt complexes can be isolated as pure solids that are stable in solutions of non-coordinating solvents such as n-pentane or cyclohexane, as well as tetrahydrofuran. These results demonstrate the correlation between the binding mode of the Lewis acid and N–N weakening in heterotrimetallic dinitrogen complexes.

Supporting Information



Publication History

Received: 16 January 2024

Accepted after revision: 05 February 2024

Accepted Manuscript online:
07 February 2024

Article published online:
29 February 2024

© 2024. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by/4.0/)

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