Triisopropylsilane

Triisopropyl silane (TIPS) is an organosilicon compound with the formula ("i"-Pr)3SiH ("i"-Pr = isopropyl). This colorless liquid is used as a scavenger in peptide synthesis. It can also act as a mild reducing agent.
In peptide synthesis, TIPS is used as a scavenger for peptide groups being removed from the peptide sequence at the global deprotection. TIPS is able to scavenge carbocations formed in the deprotection of a peptide as it can act as a hydride donor in acidic conditions. Silanes may be preferred as scavengers in place of sulfur-based scavengers.