Trigonal-prismatic versus octahedral molecular structures in [CH3)nMX6-n]] compounds

Area of Science:

• Organometallic Chemistry
• Coordination Chemistry
• Inorganic Chemistry

Background:

• Organometallic compounds are crucial in catalysis and materials science.
• Understanding the molecular geometry of these compounds is key to predicting their reactivity and properties.
• Molybdenum (Mo) and Tungsten (W) are transition metals with diverse coordination chemistries.

Purpose of the Study:

• To determine and report the precise molecular structures of four specific organometallic compounds.
• To elucidate the coordination geometries adopted by these molybdenum and tungsten complexes.
• To provide foundational structural data for future studies on related compounds.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular structures.
• Crystallographic data were analyzed to establish bond lengths, bond angles, and overall molecular geometry.
• The reported structures include [(CH3)5MoOCH3], [(CH3)4Mo(OCH3)2], [(CH3)5WCl], and [(CH3)3WCl(OCH3)2].

Main Results:

• The molecular structure of [(CH3)5MoOCH3] was determined to be trigonal-prismatic.
• The molecular structure of [(CH3)4Mo(OCH3)2] was determined to be trigonal-prismatic.
• The molecular structure of [(CH3)5WCl] was determined to be trigonal-prismatic.
• The molecular structure of [(CH3)3WCl(OCH3)2] was determined to be octahedral.

Conclusions:

• The study successfully characterized the molecular structures of four organometallic complexes.
• A preference for trigonal-prismatic geometry was observed in three of the studied compounds.
• The compound [(CH3)3WCl(OCH3)2] adopts an octahedral geometry, highlighting the influence of ligand environment on coordination preference.