Synthesis and Structure of Triphenylscandium-bis(tetrahydrofuran)

✍ Scribed by Markus A. Putzer; Glenn P. Bartholomew

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: German
• Weight: 62 KB
• Volume: 625
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(199911)625:11<1777::aid-zaac1777>3.0.co;2-j

✦ Synopsis

Metathesis reaction of ScCl 3 (THF) 3 with 3 equiv. of phenyllithium in THF/Et 2 O solution affords ScPh 3 (THF) 2 (1) in good yield. The crystallographically determined molecular structure of 1 reveals a trigonal-bipyramidal coordination sphere with the THF molecules in the axial positions and Sc±C bonds of 2.245(4)±2.266(4) A Ê . The r-bound phenyl groups are only slightly twisted (0, 8, 18°) with respect to the ScC 3 plane. Ab initio calculations suggest that the THF molecules play some direct role in the moderate coplanarity of the phenyl rings.