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Properties of Organometallic Compounds

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

Metal-Ligand Bonds

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

Periodic Classification of the Elements

Periodic Classification of the Elements

The periodic table arranges atoms based on increasing atomic number so that elements with the same chemical properties recur periodically. When their electron configurations are added to the table, a periodic recurrence of similar electron configurations in the outer shells of these elements is observed. Because they are in the outer shells of an atom, valence electrons play the most important role in chemical reactions. The outer electrons have the highest energy of the electrons in an atom...

Valence Bond Theory

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

Properties of Transition Metals

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.

Structural Isomerism

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...

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Related Experiment Video

Updated: Nov 22, 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

Diphosphanylmetallocenes of Main-Group Elements.

Carsten Müller¹, Joshua Warken¹, Volker Huch¹

¹Faculty of Natural Sciences and Technology, Department of Chemistry, Saarland University, Campus Saarbrücken, 66123, Saarbrücken, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|January 7, 2021

Summary

This summary is machine-generated.

Researchers synthesized novel magnesium metallocenes (magnesocenes) with diphosphanyl ligands. These compounds enable access to new group 14 tetrelocenes and group 15 stibonocenes, expanding organometallic chemistry.

Keywords:

antimony group 14 heterobimetallic complexes magnesium metallocenes

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Area of Science:

Organometallic Chemistry
Main-group Chemistry
Ligand Design

Background:

Metallocenes are important organometallic compounds.
Developing new ligands is crucial for expanding catalytic and coordination chemistry.
Exploring s- and p-block elements in metallocene structures offers unique reactivity.

Purpose of the Study:

To synthesize and characterize novel 1,1'-diphosphanyl-substituted magnesocenes.
To investigate the transmetalation reactivity of these magnesocenes.
To explore the coordination chemistry of the resulting s- and p-block metallocenes.

Main Methods:

Synthesis of magnesium-based metallocenes with diphosphanyl ligands.
Structural characterization using spectroscopic and crystallographic techniques.
Transmetalation reactions to form group 14 and group 15 metallocenes.
Coordination studies with transition-metal and main-group fragments.

Main Results:

Successful synthesis and structural elucidation of novel magnesocenes.
Demonstrated transmetalation to access tetrelocenes and stibonocenes.
Identified Lewis-amphiphilic character in the novel bis(phosphanyl) ligands.
Presented diverse coordination complexes with various metal centers.

Conclusions:

The synthesized magnesocenes are versatile precursors for s- and p-block metallocenes.
The novel bis(phosphanyl) ligands exhibit unique Lewis-amphiphilic properties.
This work expands the scope of metallocene chemistry and ligand design.