Tests For Organic Compounds Flashcards
(32 cards)
What is the reagent for test 2,4, DNP?
2,4, DNP
What is 2,4, DNP a test for?
Carbonyl group
What would indicate a positive result for a 2,4, DNP test?
Orange ppt
Compounds that test positive for a 2,4, DNP test
Aldehyde and Ketones
What is the reagent for the Iodoform test?
Sodium hydroxide iodine
What is iodoform a test for?
CH3-C=O
CH3-C-OH
Compounds that test positive for a Iodoform?
Ethanol
Methyl Ketones
Methyl alcohols
What would indicate a positive result for a Iodoform test?
Yellow ppt
What is the reagent for a Tollens test?
Silver nitrate
Sodium hydroxide
Ammonia
What is tollens a test for?
aldehydes
What would indicate a positive result for tollens?
Silver mirror (grey ppt)
Compounds that test positive for a tollens test?
Aldehydes (compounds with aldehyde group)
What are the reagents for a fehlings test?
Copper sulfate
Sodium hydroxide
What is fehlings a test for?
Aldehydes
What would indicate a positive result for a Fehlings test?
Red ppt
What compounds would test positive for a fehlings test?
Aldehydes (compounds with a aldehyde group)
What are the reagents for an Iron III chloride test?
Iron (III) chloride
What is Iron III chloride a test for?
Phenol
What would indicate a positive result for an Iron III chloride test?
Purple colour (from brown)
What compounds test positive for an Iron III chloride test?
Phenols (compounds with a phenol group)
What are the reagents for a dichromate test?
Heat with H+/ acidified dichromate
What is dichromate a test for?
Alcohols
What would indicate a positive result for a dichromate test?
Orange colour to green
Compounds that test positive for a dichromate test
Primary and secondary alcohols (primary will for aldehyde, secondary will form ketone)
