GenChem review plus Naming & Structures Flashcards
Eth
2 C
Meth
1 carbon
Prop
3 C
But
4 C
pent
5 C
hex
6 C
hept
7 C
oct
8 C
non
9 C
dec
10 C
Alkanes only have
Carbon and hydrogen atoms (hydrocarbons) single bonds.
H replaced by OH=
alcohol
H repl by NH2=
amine
H repl by halogen
alkyl halide
H repl by OR
ether
Primary
attached to 1 other carbon
secondary
attached to 2 carbons
tertiary
attached to 3 carbons
iso-
common name.
Have CH w/ two CH3
sec-
secondary carbon is attached to the parent chain
attached to 2 other C
ter-
attached to 3 other carbon
Atomic #
protons & electrons for a neutral atom
mass #
P & N
Ionic bond
metal + nonmetal
covalent bond
2 nonmetals
most organics are (polarity)
bipolar. Part polar part nonpolar
Lewis structure shows
lines, 1 dimensional, + lone pairs, formal charge
Kekule structure
similar to Lewis structures w/o lone pairs, formal charge
Condensed structures
No bonds shown, all elements involved and how they are bonded. NOT a molecular formula
Line bond structure
No C or H shown
Lewis acid*
e- pair acceptors (e- deficient)
Lewis base*
e- pair donors (e- rich)
Bronstead-Lowry acid
H+ donor
Bronstead-Lowry base
H+ acceptor
single bond
σ
double bond
σ, π
Triple bond
σ, 2π
diamagnetic
all e- are paired up
paramagnetic
some unpaired e- (anti-bond)
Bond order formula
Bonding electrons – antibonding electrons
2
Formal charge
(# val e-) - (# lone pair e- )
2
2 groups attached
sp hybridized
sp+sp
3 groups attached
sp2
sp2+sp2+sp2
4 groups attached
sp3
sp3+sp3+sp3+sp3
5 groups attached
sp3d1
Conjugate pairs
differ by one H+
acids have more than bases
Ka
acid dissociation constant
[products]/ [reactants]
inc Ka inc strength
Pka
-log[ka]
↓pka inc acid strength
In determining acid/bases ____ predominates over _____
size
EN
Strongest acids
HCl
HI
H2SO4
HNO3
HClO4
weak overlap
H+easily comes off
favorable reactions
strong reactants-> weaker products(stable)
Resonance
Creates a weaker base
Formal charge for metals
charge -bonds
constitutional isomers
same molecular formula, different drawing (diff connectivity)
Parent chain
longest C chain
Formal naming
IUPAC names.
Longest parent chain, substituents and location
substitients
location-name-loc-name parent
written in alphabetical order (sec,tert don’t count)
#locations=#substituents
Halogens as substituents
fluoro
chloro
iodo
bromo
when naming
OH as substituent
Hydroxy
ethers
“alkoxy”
ex: OCH3=methoxy
isopropyl
Y
prefixes (di,tri…) used for
more than one same substituent
isobutyl
alcohols
alkan-ol
OH=hydroxy (lowest #possible)
amines
alkan-amine
ex: propanamine
Intermolecular forces
dispersion
dipole-dipole
H-bonding
ion-dipole
ion-ion