Covalent Hypercoordination: Can Carbon Bind Five Methyl Ligands?. Issue 30 (10th June 2014)

• Record Type: Journal Article
• Authors: McKee, William C.; Agarwal, Jay; Schaefer, Henry F.; Schleyer, Paul von R.
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 30(2014)
• Page Start: 7875
• Page End: 7878
• Publication Date: 2014-06-10
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201403314
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>C(CH₃)₅⁺ is the first reported example of a five‐coordinate carbon atom bound only to separate (that is, monodentate) carbon ligands. This species illustrate the limits of carbon bonding, exhibiting Lewis‐violating "electron‐deficient bonds" between the hypercoordinate carbon and its methyl groups. Though not kinetically persistent under standard laboratory conditions, its dissociation activation barriers may permit C(CH3)₅⁺ fleeting existence near 0 K.</p> </abstract>