Paper 2-2019 Flashcards
(14 cards)
Preparation of 1,6-diaminohexane by reaction of 1,6-dibromohexane with excess ammonia
Br-(CH2)Br +4NH3–>NH2-(CH2)6NH2 +2NH4Br
Why cyclohexene can be separated from aq sol using separating funnel
Liquids are immiscible/insoluble
How to know cyclohexene is dry after addition of CaCl2?
Clear solution
Why stereoisomers arises
Restricted rotation around C=C bond
Why polymer golf balls can’t biodegrade
C=C non polar and can’t be hydrolysed
Distinguish between 1° and 2° alcohols
K2Cr2O7
1°- orange to green 2° - no reaction occurs
Isomer X- iupac name for pentane shape with ketone on top
Cyclopentanone
Why ethanol chloride not used in industry
Vulnerable to hydrolysis/too expensive
Suitable reagent for hydrolysis of protein
Conc. HCL
Why necessary to use two different solvents
Some don’t dissolve in 1st solvent
Why dicarboxylic acid can be distinguished by two diols via electron spray ionisation
Different Mrs
Co2 causes global warming
C=O absorbs IR/has same frequency as IR radiation. Energy trot other molecules in atmosphere by collisions and warms atmosphere, ir emitted by earth doesn’t escape atmosphere
Why NaBH4 reduces aldehyde and not alkene
H- ion attracted to delta positive carbon
Electron rush C=C bind
C=C only attacked by electrophiles
Aldehyde us reduced euthanasia insufficient NaBH4 how to confirm reaction was incomplete
Fehling solution ,red ppt
