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Coordination Compounds and Nomenclature

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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...

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Related Experiment Video

Updated: Jun 16, 2025

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

Synthesis of Mn(III)X₃ (X = Cl, Br, I) Compounds with Phosphine (R₃P) Ligands.

Sanchita Paul¹, Ananya Saju¹, Cooper Cohen¹

¹Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States.

Inorganic Chemistry

|August 15, 2024

Summary

This study introduces robust methods for synthesizing rare manganese(III) halido phosphine complexes, improving upon low-yield air oxidation techniques. New protocols yield diverse manganese complexes, clarifying previous chemical controversies.

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Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI

Preparation and Reactivity of a Triphosphenium Bromide Salt: A Convenient and Stable Source of PhosphorusI

Published on: November 22, 2016

Area of Science:

Inorganic Chemistry
Coordination Chemistry
Materials Science

Background:

Manganese(III) halido phosphine complexes of the form [Mn^IIIX₃(PR₃)₂] are rare coordination compounds.
Previous synthetic routes involving Mn(II) halide and phosphine oxidation yielded low product yields and inconsistent results.

Purpose of the Study:

To develop robust synthetic protocols for new and known manganese(III) halido phosphine complexes.
To characterize these complexes and resolve controversial aspects of manganese halide-phosphine chemistry.

Main Methods:

Utilized [Mn^IIICl₃(OPPh₃)₂] as a starting material for new synthetic strategies.
Developed new synthetic protocols for various manganese(III) and manganese(II) complexes.
Characterized the synthesized [Mn^IIIX₃(PR₃)₂] species.

Main Results:

Established robust synthetic protocols for [Mn^IIIX₃(PR₃)₂] complexes (X = Cl, Br, I).
Synthesized related complexes including [Mn^IIICl₂(dmpe)₂]⁺ salts and [LMn^IIX₃]^- manganates.
Provided definitive characterization of [Mn^IIIX₃(PR₃)₂] species, clarifying prior chemical ambiguities.

Conclusions:

The new synthetic strategies offer reliable access to rare manganese(III) halido phosphine complexes.
The comprehensive characterization resolves long-standing controversies in manganese chemistry.
This work advances the understanding and synthesis of manganese coordination compounds.