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Keating Mistakes
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84 Terms
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1
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Draw DME
Dimethoxyethane
\-o/\\/o-
2
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Draw Bz
Bz
Z is a rare letter
It’s a thing you never see! BENZOYL= ketone bit branched out of benzene
3
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Draw Bn
Benzyl
Benzene w/ methyl
4
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Why does EtOH have a larger b.p. than Et2O
Ethanol can self associate with h-bonds
5
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Why can’t you get 100% pure ethanol via distillation?
Vapour reaches 96% purity- same as liquid- no more purification
6
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Draw propylene glycol
7
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List three solvents for oral medicines-
* glycerol
* ethanol
* propylene glycol ( 2 hydroxyls, 3 carbon chain)
8
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Name a cationic surfactant
benzylalkonium chloride
9
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draw beznyl alkonium chloride
10
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draw sodium lauryl sulfate
Na+ is the floaty bit
Sulphate is attached to the carboxylic bit, replacing H
11
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give other names for surfactants
detergent
emulsifying agents
12
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explain amphillic
Compounds which simultaneously have both lipophilic and hydrophilic properties in the one molecule
13
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draw
**sodium stearate**
14
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Give the systematic name for S
stearic acid C=18
remember the n-
n-octadecanoic acid (an= no alkyne/alkene bonds)
15
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Whats SDS
sodium dodelyl sulphate
16
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describe the lenght of Benzalkonium chloride
8-18 carbon chain
17
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draw **cetyl pyridinium chloride**
pyridine = 6 membered aromatic ring
16 carbon chain atatched to the N
hence quartenary amine= + charge
18
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how many c in myristic acid
14
19
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how many c in palmic acid
16
20
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how many c in stearic acid
18
21
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how many c in lauric acid
12
22
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how many c in capryl acid?
8
23
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How many c in caprylyl acid
10
24
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draw sorbitan monostearate
the fatty acid added at the primary alcohol of sorbitan
25
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what’s the structure of oleic acid
\
Oleic acid
9*Z*-hexadecenoic acid
16 carbion chaiin
cis alkene bond at C9
\
26
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which have PEG units
tweens/ spans
Tweens HAVE FATTY ACID + PEGS
spans have ONLY the monopalmitate bit (fatty acid bit!)
27
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draw a polysorbate monoester (tween)
28
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describe how to increase / decrease aq solubity of a polysorbate monoester
for an x amount of ethoxy groups within the molecule→ more esters= more lipophillic
\
more ethoxy groups (n /o\\/ ) more hydrophillic
29
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draw azo
30
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Draw quinine
31
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draw an indigoid
32
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draw triarylmethane
33
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whtas the range of the visible sprectrum?
400-800nm
34
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where is red absorbed
500nm lamba max
35
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what’s used to measure the lamba max?
visible spectrometer
36
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what’s electron delocation
e- movement throught the overlapping pi orbitals
37
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what’s a conjugated system
system of overlapping pi orbitals tahts allows for delocalisation of pi electrons (in double bonds/triple/lone pairs)
38
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what controls the colour
The greater the degree of conjugation, the longer the wavelength required (lower energy) for π-electrons to undergo transition
→ pi electrons bounce more easily if more conjugation so less energy needed= longer wavelenght (red absorbed)
\
39
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why does pH alter colour
partially protenated= no lone pairs on amine for example
less conjugation → higher energy, shorter wavelenghts absorbed wh
40
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what happens when electrons absorb energy from wavelnghts
promoted to a higher energy level
no longer have opposite spin
→ quantum of specific energy is absorbed by one of the electrons, it may undergo a transition to a higher, excited state (↑↑) – σ to σ\* or π to π\*.
41
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what are the rules for a ring flip?
up stays up
down stays down
equitorial becomes axial (and vice versa)
where C2 was, C1 replaces it
the first two / / parrallel lines are drawn in the opposite direction→ \\ \\
wedge = up
dash=down
42
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explain the difference between monoterpenes and sesquiterpenes
monoterpene→ one set of C-10
sesqui (1.5) terpene→ one and a half sets of C10→ C15 in total
\
43
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what measures the composition of oils?
gas chromotography
44
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draw vanillin
benzyladehyde base
hydroxy group at C4
methoxy group at C3
when naming the hydroxy group goes firts despite being @ C4 due to alphabetical order
45
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what’s the difference between vanillina nd vanillic acid?
vanillic acid has the benzylALDEHYDE oxidised to the acid form
46
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what’s the difference between thymol and methanol
thymol is an aromatic ring
planarhow
47
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how do amine taste
bitter
48
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draw methanol
one methyl
one isopropyl group
one hydroxyl
49
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draw the major componnemt of aniseed oil
trans!
methoxy para to the propene substituent
called trans anethole
50
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what can bond to H by h bonding?
lone pairs of e- of O / N
51
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whats a furanose
5 memberred ring with o
52
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what molecules are chiral
ones with 4 dif substituents
SOS TAG isnt chiral, O bit has 2 S subsituents
53
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where can you start the mesomeric move of e- when doing resonance structures
not only at the lone pair
go ahead and start at the middle of the ring!
54
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what’s the hawroth projection
the ring onede
55
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describe the stereohemistry of fisher prohection
vertical bonds→ dashed
horizontal bonds→ wedged
56
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whats \[a\]d
specific optical rotation
independent of conc and sample tube lenght
57
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whats the anomeric carbon
carbon derived from the carbonyl
new chiral centre
58
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how does a mutorotation work
all three (alpha, beta, aliphatic) in equilibrium in aq sol
beta→ aliphatic→ alpha and so on by doing a twistyy
59
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what wavelenght is sodium d light?
589nm
60
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whats th flash point?
min temp needed to vapourise
61
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why does the sulfone group increase solubility
allows partial ionisation at a pH of 7
62
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what’s e delocalisation
the movement of e- through overlapping pi orbotals due to conjugation
63
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if pka>ph protenated / deprotenated?
protenated
remmeber
amines @peptide pka= 9 , at phys pH they are protenated
64
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draw vinylchrolide
vinyl→ c=c bond
chloride replaces a H
65
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Draw PVC and assign polymer type
homopolymer linear
66
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draw acrylnitrile
C=C
one H replaced with cyano group
67
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whats methin
R3-C-H
the carbon attached to three Rs
68
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how are graft polymers made?
x/ gamma radiationde
69
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describe graft polymer structure
made with homopolymers
a-a-a-a branched off of b-b-b-b
70
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describe the properties of graft polymers
retain some of the homopolymers
71
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how are random polymers made
radical mechanism
72
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how are block copolymers made
ionic polymerisation
73
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describe propertie of block copolymers
retain some from homopolymers
74
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draw ethylene oxide
epoxide
2c one Od
75
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draw propylene oxide
3carbon - epoxide and a methyl CHIRAL!!!
\
76
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describe the sterreochem of polyoxalane
if the propylene oxide racemic then polyoxalene is also racemic
77
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draw vinylbenzene
benzene-C=C
78
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what kimd of polymer does vinylbenzene and acrylnitrile make?
regualr polymer
a-b-a-b
79
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what are crosslined polymers
their branches are also linked to each other
80
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describe the phys properties of crosslinked polymers
swell when a=water added
decreased solubility
81
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whats the name of acrrylic acid with a methyl replacing H on the hydroxy group
methyl acrylate w
82
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whats the name of acrrylic acid with a methyl replacing H on the ethene
methyl acrylic acid d
83
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draw acrylic acid
ethene with COOH on it
84
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