Lewis acids and bases factors, in addition to electron configuration factors, play a role in determining the strength of the interaction between the bulky di-"t"-butylpyridine and tiny proton. Lewis acids and bases A Lewis acid is a chemical species that contains an empty orbital which is capable of accepting an electron pair from a Lewis base to form a Lewis adduct. A Lewis base, then, is any species that has a filled orbital containing an electron pair which is not involved in bonding but may form a dative bond with a Lewis acid to form a Lewis adduct. For example, NH is a Lewis
No Substance Tour and Unwritten Law, although that line-up varied from show to show. Greg Graffin – Vocals<br> Brian Baker – Guitar and back-up vocals<br> Jay Bentley – Bass and back-up vocals<br> Greg Hetson – Guitar<br> Bobby Schayer – Drums No Substance Tour The No Substance Tour was a concert tour by punk rock band Bad Religion in support of their album, "No Substance" The second North American leg was a part of the Warped Tour 1998. Some of the other bands that performed that year were Rancid, NOFX, The Specials, Less Than Jake and Deftones. The second European leg was a part