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o-chem
Question/Term | Answer/Definition |
---|---|
Isotope peak | M+ with atom(s) that are not the most abundant isotopes |
Odd M+ usually suggests what type of atom(s) in the molecular formula? | Nitrogen in molecular formula, usually just one |
Degrees of Unsaturation formula | U=1+C-[(H+X-N)/2] |
What does the "13" in the rule of 13 represent? | CH |
16-O equivalence in CxHy? | CH4 |
14-N equivalence in CxHy? | CH2 |
12-C equivalence in CxHy? | H12 |
Calculate the m/z of Sucrose: C12H22O11 | C: 12 x 12 = 144 H: 22 x 1 = 22 O: 16 x 11 = 176 144+22+176 = 342 m/z |
Molecular Ion (M+) | Molecule minus one e- and made of the most abundant isotopes |
Most abundant isotope of Hydrogen? | 1-H(1 proton + 1e-) |
Most abundant isotope of Carbon? | 12-C(6 proton + 6 neutron + 6e-) |
Most abundant isotope of Nitrogen? | 14-N(7 proton + 7 neutron + 7e-) |
Most abundant isotope of Oxygen? | 16-O(8 proton + 8 neutron + 8e-) |
Most abundant isotope of Bromine? | 79-Br(35 proton + 44 neutron + 35e-) |
(M+) w/th 2 signals, ~48% of what M+ indicates what atom is in the Molecular Formula? | 79-Br, 81-Br = ~51%, ~49% |
Sn1 stands for: | Substitute Nucleophilic Unimolecular RDS |
Sn2 stands for: | Substitute Nucleophilic Unimolecular RDS |
E1 stands for: | Elimination Unimolecular |
E2 stands for: | Elimination Bimolecular |