Chem 3BL - Lab 6 Identify unknown aldehyde

Chem 3BL - Lab 6 Identify unknown aldehyde - Lab 6...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lab 6 – Identifying the Structure of an Aldehyde by Qualitative Analysis Purpose: The purpose of this experiment is to use physical properties of an unknown compound to identify its structural identity. Discussion and Results : Through the analysis of two melting points, the identity of the unknown aldehyde was determined. The first melting point narrowed the possibilities down to four or five of the structures – benzaldehyde, 4-dimethylamino-benzaldehyde, vanillin, and 3- nitrobenzaldehyde. The second melting point taken was of a dimethone anhydride derivative which yielded a separate melting point which confirmed that benzaldehyde was the unknown structure. It was necessary to make two derivatives because the first dimedone derivative had too many similar melting points and in order to narrow and confirm the possibilities the second anhydride derivative had more of a varied melting point range among the possibilities, allowing the decision to be certain. After determining what the identity was, there are physical properties
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/28/2008 for the course CHEM 3BL taught by Professor Chunmei during the Spring '08 term at University of California, Berkeley.

Page1 / 2

Chem 3BL - Lab 6 Identify unknown aldehyde - Lab 6...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online