톨렌스 검출 (은거울)
RCHO + 2Ag(NH3)2+ + 2OH− → RCOO− + 2Ag + 4NH3 + H2O
개요
Tollens' reagent (silver-ammonia complex) is reduced to metallic silver by aldehydes, producing a silver mirror on the test tube walls. The aldehyde is oxidized to a carboxylate. This test distinguishes aldehydes from ketones, as ketones cannot be easily oxidized. It was historically used for mirror manufacturing.
참여 물질
일상 속 예시
The silver mirror test creates a beautiful reflective coating on glass, and this chemistry was actually used to make mirrors commercially.
산업적 중요성
톨렌스 시험은 유기 화학에서 알데하이드 식별에 사용됩니다. 화학적 환원에 의한 은 거울 제조는 여전히 고품질 거울에 사용됩니다.
성질
- 유형
- 산화·환원
- 가역 반응
- 아니오
- 에너지
- 발열
- ΔH
- -135.0 kJ/mol
자주 묻는 질문
What is the equation for 톨렌스 검출 (은거울)?
The balanced equation is: RCHO + 2Ag(NH₃)₂⁺ + 2OH⁻ → RCOO⁻ + 2Ag + 4NH₃ + H₂O.
What type of reaction is 톨렌스 검출 (은거울)?
톨렌스 검출 (은거울) is a 산화·환원 reaction.
Is 톨렌스 검출 (은거울) exothermic or endothermic?
톨렌스 검출 (은거울) is exothermic (releases energy). The enthalpy change (ΔH) is -135.0 kJ/mol.