other

Question 1

wavenumber

Answer 1

V/C (frequency/speed of light)

(1/2piC)(f/mred)

f=force constant, bond strength inc wavenumer inc.

mred = heaver attoms dec wavenumer

Question 2

heavyer attoms in IR

Answer 2

cause a dec in wavenumer

Question 3

Bond strength in IR

Answer 3

inc wavemenuber

Question 4

Bond strecgth stronger, bond charatar

Answer 4

is more S charatar, smaler orbitals

Question 5

Csp-H

Answer 5

3200

Question 6

Csp2-H

Answer 6

LEFT of 3000

Question 7

Csp3-H

Answer 7

RIGHT of 3000

Question 8

tripple bond in IR

Answer 8

2300-2100

Question 9

double bond in IR

Answer 9

1900-1600

Question 10

IR fingerprint regon

Answer 10

below 1500

Question 11

IR intesnity

Answer 11

inc absorbion inc signal

inc polar bond, inc absorbtion

Question 12

symetrical in IR

Answer 12

may not show up

Question 13

OH Bonds in IR

Answer 13

are broad

because of H bonding

Question 14

Amines in IR

Answer 14

Two signals - symetric and asymetic

primary (NH2)- two N-H singals

Secondary(NH) - 1 N-H bond

Question 15

Mas spec formula

Answer 15

inc mass - dec turn

inc charge - harder turn

mass/charge =M/Z (Z usaly +1) =M

Question 16

Molecular Ion peak

Answer 16

M not stable fragment

is frutherst right (rest/small peaks are from isotopes)

Question 17

Base peak

Answer 17

largest set to 100

Question 18

Br mas spec

Answer 18

Question 19

Cl Mass spec

Answer 19

Question 20

High resolution mass spec

Answer 20

differntate between small differences (in mol weight)

Question 21

Gass chromotography mass spec

Answer 21

take mixture - pull out specific moleucle - cleaned sample

leave in GC at differnt times - analize mas spec

Question 22

Electrospray Ionization

Answer 22

ESI

soft ionization

sample disolve in solvent - gives charge

used for large molecules

Question 23

HDI

Answer 23

add 1 degree of unsat for every 2 hydrogen atoms mission

add 1H for each halogen

Igonre Oxygen

Subtract one H for each N

Question 24

HDI formula

Answer 24

1/2 (2C(# carbons)+2+N(# nitrogens)-H(#hydrogens)-X (# halogens)

Question 25

shielding and dehsilding

Answer 25

more e density, shields/protects nuc, more upfield less e density, dec sheilding more downfield

Question 26

spin

Answer 26

nucli with odd number of protins and/or neutrons

Question 27

chem equiv or not

Answer 27

methyl (ch3) - equiv methylene - no sterocenter, equiv. sterocenter - not equiv

Question 28

Integration

Answer 28

area under signal - number of protons devide all by smallest and multiply by two -\>ratio

Question 29

1-7 in splitting

Answer 29

singlet doublet triplet quartet quintet sextet septet

Question 30

ethyl H NMR

Answer 30

2H - 4 peaks, quartet 3H - three peaks - tripelt

Question 31

Isopropl H NMR

Answer 31

1H - multiplet 6H - singlet

Question 32

tert butyl H NMR

Answer 32

9H - singlet

Question 33

completx couppling

Answer 33

number of peaks = (n+1)(n+1)

Question 34

Libel protons

Answer 34

produce broad singla OH, NH

Question 35

DEPT

Answer 35