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Bidentate phosphorus baskets by intramolecular phosphinidene addition
Sander G A van Assema1, Andreas W Ehlers, Frans J J de Kanter
1Department of Organic and Inorganic Chemistry, Faculty of Sciences, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|March 11, 2006
Summary
Researchers synthesized novel molybdenum-phosphine complexes via intramolecular phosphinidene addition. These unique phosphorus heterocycles, or "baskets," feature varied ring compositions and distinct structural characteristics.
Area of Science:
- Organometallic Chemistry
- Inorganic Chemistry
- Heterocyclic Chemistry
Background:
- Seven-membered phosphorus heterocycles are valuable synthetic targets.
- Molybdenum-phosphine complexes exhibit diverse reactivity and structural properties.
Purpose of the Study:
- To synthesize novel molybdenum-phosphine complexes with unique phosphorus heterocycles.
- To investigate the structural features of these newly synthesized complexes.
Main Methods:
- Intramolecular phosphinidene addition to C==C bonds of Mo-complexed heterocycles.
- Synthesis of unsaturated tetrahydrophosphepine precursors via ring-closing metathesis or cyclization.
- X-ray crystallography for structural determination.
Main Results:
- Three novel [(diphos)Mo(CO)(4)] complexes (18-20) were synthesized.
- The phosphorus baskets feature varied ring compositions (CH2, NCH3, or O).
- Crystal structures revealed small P-Mo-P angles and shortened Mo-P bond lengths in specific derivatives.
Conclusions:
- The study successfully demonstrates the synthesis of novel molybdenum-phosphine complexes with diverse phosphorus heterocycles.
- The structural analysis provides insights into the coordination chemistry and bonding in these unique organometallic compounds.