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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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A Germacalicene: Synthesis, Structure, and Reactivity.

Zhaowen Dong¹, Lena Albers¹, Marc Schmidtmann¹

¹Institut für Chemie, Carl von Ossietzky Universität Oldenburg, Carl von Ossietzky-Str. 9-11, 26129, Oldenburg, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|November 20, 2018

Summary

This summary is machine-generated.

Researchers synthesized germacalicene, a novel cyclopropenium germacyclopentadienide ylide. Reactivity studies revealed its nucleophilic nature, leading to stable iron and silver complexes, and a unique germanium-germanium bonded dimer.

Keywords:

X-ray diffraction density functional calculations germanium transition metals ylides

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Area of Science:

Organometallic Chemistry
Main Group Chemistry
Synthetic Chemistry

Background:

Germoles are organometallic compounds with unique electronic properties.
Cyclopropenium ylides are strained, reactive species with diverse applications.

Purpose of the Study:

To synthesize and characterize a novel germacalicene compound.
To investigate the reactivity and electronic structure of germacalicene.
To explore the potential of germacalicene in forming metal complexes.

Main Methods:

Synthesis via reaction of dipotassium germole dianion with a chlorocyclopropenyl perchlorate.
Crystal structure analysis for structural elucidation.
Density Functional Theory (DFT) calculations for electronic structure.
Reactivity studies including complexation with transition metals and oxidation.

Main Results:

Successful synthesis of germacalicene (7) characterized as a cyclopropenium germacyclopentadienide ylide.
Germacalicene exhibits nucleophilic character.
Isolation of air- and moisture-stable carbonyl iron complex (15) and cationic silver complex (20).
One-electron oxidation yielded a bis-cationic Ge-Ge-bonded dimer (22).

Conclusions:

Germacalicene represents a new class of organometallic ylides with interesting electronic and structural features.
The compound demonstrates versatile reactivity, enabling the formation of stable metal complexes and unique germanium-germanium bonds.
This work expands the scope of germole chemistry and organometallic ylide research.