1.5 Flashcards
carbonyl group
carbon double bonded to an O, functional group responsible for properties in aldeydes and ketones
methanal
formaldehyde
aldehydes
terminal carbonyl group
ketones
non-terminal cabonyl group
properties of ketones and aldehydes
polar due to c-o bonds (D-D), stonger than alkanes but weaker than alchohols, lower boilng point and less soluble than alcohols, good solvents due to ability to dissolve polar and non-polar which depends on how big R group is, small aldehydes/ketones = completely soluble, size ++ = solubility down
reactions of carbonyl groups
controlled oxidation and hydrgoenation
controlled oxidation
primary alcohols = aldehyde + water secondary = ketone + water tertirary = no reaction alcohol =(O) aldehyde/ ketone + water (o) = oxidzing agent = oxygen rich compounds = cr2o72- and KMnO4
hydrogenation
need high temp, preassure + catalyst
aldehyde/ ketone + h2 = alcohol
carboxylic acid
weak acid with a carbonyl and alcohol group attaches, sour/ tangy taste, polar, strong h-bonding and dipole-dipole, small Ca are soluble in water but solubility decreases as size does, higher melting, bigger np end = more ld, neutralizes
ester
organic compound cotnaining a carbonyl group bonded to a O bonded to a R group, responsible for odour and flavourings, no hydroxyl group = less polar than ca = no H-bonding, small ester are more soluble in water due to polarity of c-o bonds. less soluble than Ca + lower boiling, polarity = similar to aldehyde/ketones, organic salt
ester reactions
esterfication, hydrolysis and saponification
ca reactions
contorlled oxidization of a aldhyde
esterfication
ca + alcohol with h2so4 makes ester + water
hydrolysis
ester + strong base = alcohol + salt of acid
nh
amino functional group