5 5.1 mass spectrometer electron impact, EI 5.1 :;"< 789 =>? *!"#$%& '%&(),,,-./ 0.12%3456 :;"@AB CDEFG:;"HIJK@LMN :;"@HIOPQ0RST6 5.1. 70 ev molecular ion #"$%& M M e!"!"'() #" m/z ; m = z = 1 mass spectrum, 1
MS 5.2 a. MS 5.2 m/z normal molecular mass CH 2 CH 2 CH 2 (C 5 H 12 ) 43 29 (M ) 15 57 72 5.2 m/z = 72 C C C1 C2 C2 C3 m/z = 43 (base peak) CH 2 CH 2 CH 2 m/z = 43 CH 2 CH 2 CH 2 m/z = 29 CH 2 CH 2 CH 2 m/z = 72 CH 2 CH 2 CH 2 m/z = 57 CH 2 CH 2 CH 2 m/z = 15 2
5.3 5.4 2 43 CHCH 2 (C 5 H 12 ) 57 M 5.3 2 C (C 5 H 12 ) 57 41 M 5.4 3
2 MS 5.3 m/z = 57 2 CHCH 2 CHCH 2 m/z = 72 m/z = 57 t m/z = 57 5.4 C m/z = 72 C m/z = 57 5.5 m/z = 92 M 1 m/z = 91 H CH 2!" m/z = 92 m/z = 91 m/z = 91 4
5.5 m/z 1 2 1 2 H H CH 2 CH 2 CHCH 2 CH 2 =CHCH 2 m/z = 43 m/z = 42 m/z = 41 b. m/z 1 2 M1 M2 M1 12 C 13 C 12 C 1.11 13 C 1.11 12 C 13 C 5 M 1 5 0.0111 5.1 5
M2 79 Br 81 Br 1 1 35 Cl 37 Cl 3 1 5.6 6.7 1 2 MS 5.1 12 C 100 13 C 1.11 1 H 100 2 H 0.016 14 N 100 15 N 0.38 16 O 100 17 O 0.04 18 O 0.20 32 S 100 33 S 0.78 34 S 4.40 28 Si 100 29 Si 5.10 30 Si 3.35 19 F 100 35 Cl 100 37 Cl 32.5 79 Br 100 81 Br 98.0 43 CH 2 CH 2 Br 122 124 5.6 1 6
Cl 43 CH M 15 M 78 80 5.7 2 1 123 m/z = 122 124 5.6 79 Br 81 Br m/z = 43 m/z 2 2 2 m/z = 78 80 3 1 5.7 Cl m/z = 43 m/z = 63 65 M 15 Cl C C C Cl 343 kj mol 1 C C 355 kj mol 1 35 Cl 37 Cl CH CH m/z = 78 m/z = 80 CH= 35 Cl CH= 37 Cl m/z = 63 m/z = 65 CH m/z = 43 Cl 7
c. 5.8 2 m/z = 45 59 m/z = 45 m/z = 74 CHCH 2 m/z = 74 CH 2 CH HCCH2 m/z = 59 m/z = 45 CH HCCH 2 CHCH 2 M 5.8 2 5.9 1 MS 2 m/z = 56 M 18 H 2 O M 18 8
H H 2 C H 2 C 2 H 2 C CH 2 m/z = 74 m/z = 56 m/z = 56 m/z = 31 m/z = 43 41 m/z = 43 CH 2 CH 2 CH 2 m/z = 74 HCH m/z = 31 HCH CH 2 CH 2 CH 2 CH 2 CH 2 M 5.9 1 d. 2 MS 5.10 5.11 2 MS 5.10 m/z = 43 57 9
M 1 O CCH 2 m/z = 72 C O m/z = 43 CH 2 CH 2 C O m/z = 57 O CCH 2 5.10 2 m/z = 44 M 28 5.11 28 C H McLafferty H H O CH 2 m/z = 72 H m/z = 44 CH 2 CH 2 10
O CH 2 CH 2 CH 5.11 MS 77 105 106 11
O C H H C O CO m/z = 106 m/z = 105 m/z = 77 5.3 m/z m/z 0.0001 amu 72 C 5 H 12 C 4 H 8 O C 4 H 5 F C 3 H 6 N 2 C 3 H 4 O 2 72.0939 72.0575 72.0375 72.0532 72.0211 amu 5.2 5.2 1 H 1.007825 32 S 31.97207 12 C 12.000000 14 N 14.00307 16 O 15.99492 19 F 18.99840 35 Cl 34.96886 37 Cl 36.96590 79 Br 78.91835 81 Br 80.91635 12