Midterm 1 Flashcards
Organic Chemistry
the chemistry of compounds that contain the element carbon
Covalent bond
formed by sharing electrons between atoms of similar electronegativities to achieve the configuration of a noble gas
Electronegativities
increasing left to right and going up the periodic table
Carbon
- can form strong bonds to other carbons to form rings and chains
- strong bonds with hydrogen, nitrogen, oxygen, sulfur
Valence electrons, number of bonds, and lone pairs: Hydrogen
- VE = 1
- NB = 1
- LP = 0
Valence electrons, number of bonds, and lone pairs: Carbon
- VE = 4
- NB = 4
- LP = 0
Valence electrons, number of bonds, and lone pairs: Nitrogen
- VE = 5
- NB = 3
- LP = 1
Valence electrons, number of bonds, and lone pairs: oxygen, sulfur
- VE = 6
- NB = 2
- LP = 2
Valence electrons, number of bonds, and lone pairs: Fluorine, Chlorine, Bromine, Iodine
- VE = 7
- NB = 1
- LP = 3
Formal Charges: Carbon
Normally: 4 bonds
Positive: 3 bonds
Negative: 3 bonds + 1 lone pairs
Formal Charges: Oxygen
Normally: 2 bonds + 2 lone pairs
Positive: 3 bonds + 1 lone pairs
Negative: 1 bond + 3 lone pairs
Formal Charges: Nitrogen
Normally: 3 bonds + 1 lone pair
Positive: 4 bonds + 0 lone pair
Negative: 2 bonds + 2 lone pairs
Dashed line
projects behind
wedge line
projects forward
Solid line
lies on the plane
Hydrocarbon
compounds that contains only carbons and hydrogen atoms
Alkanes
- do not have multiple bonds
- weak intermolecular interactions
naming unbranched Alkanes
- count the number of carbons and add associated prefix
- ends in -ane
Methane
1 carbon
Ethane
2 carbons
Propane
3 carbons
Butane
4 carbons
Pentane
5 carbons
Hexane
6 carbons
Heptane
7 carbons
Octane
8 carbons
Nonane
9 carbons
Decane
10 carbons
akyl
when you remove a hydrogen
Naming akyl
- same as alkanes but drop -ane and replace with -yl
Naming branched alkanes
- find the longest chain and number them
- Indicate ethyl and methyl and on which carbon their on and if there is multiple indicate how many with a prefix
methyl
1 C + 3 H
ethyl
2 C + 5H
Alkenes
have double bonded carbons