Transformation of tetranuclear [{MoO3(Lcat)Cu}2]2− into trinuclear [MoO2(Lcat)2Cu2] and possible implications for the formation of Bis(MPT)Mo by MobA

A. M. Buddhika Chandima; Umesh I. Kaluarachchige Don; Cassandra L. Ward; Richard L. Lord; Stanislav Groysman

doi:10.1039/D6CC00178E

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Transformation of tetranuclear [{MoO₃(L^cat)Cu}₂]²⁻ into trinuclear [MoO₂(L^cat)₂Cu₂] and possible implications for the formation of Bis(MPT)Mo by MobA

A. M. Buddhika Chandima,

†^a Umesh I. Kaluarachchige Don,^a Cassandra L. Ward,

^b Richard L. Lord

*^c and Stanislav Groysman

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA
E-mail: groysman@wayne.edu

^b Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, USA

^c Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, USA
E-mail: lordri@gvsu.edu

Abstract

Many molybdoenzymes contain two molybdopterin (MPT) ligands, but the mechanism for the transformation of mono(MPT)Mo into bis(MPT)Mo is lacking. Using a catecholate-based system, we demonstrate that [Mo^VIO₃(L^cat)]²⁻ forms a dimeric structure, which spontaneously disproportionates to produce [Mo^VIO₂(L^cat)₂]²⁻ and molybdate. This suggests that a similar transformation of [{MoO₃(MPT)}₂]⁴⁻ into [MoO₂(MPT)₂]²⁻ is feasible.

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DOI: https://doi.org/10.1039/D6CC00178E
Article type: Communication
Submitted: 09 Jan 2026
Accepted: 01 Mar 2026
First published: 02 Mar 2026
This article is Open Access

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Chem. Commun., 2026, Advance Article

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Transformation of tetranuclear [{MoO₃(L^cat)Cu}₂]²⁻ into trinuclear [MoO₂(L^cat)₂Cu₂] and possible implications for the formation of Bis(MPT)Mo by MobA

A. M. B. Chandima, U. I. Kaluarachchige Don, C. L. Ward, R. L. Lord and S. Groysman, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D6CC00178E

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Chemical Communications

Transformation of tetranuclear [{MoO₃(L^cat)Cu}₂]²⁻ into trinuclear [MoO₂(L^cat)₂Cu₂] and possible implications for the formation of Bis(MPT)Mo by MobA

Abstract

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Transformation of tetranuclear [{MoO₃(L^cat)Cu}₂]²⁻ into trinuclear [MoO₂(L^cat)₂Cu₂] and possible implications for the formation of Bis(MPT)Mo by MobA

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