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Chapter 11
Organic chemistry
88
Chemistry
Undergraduate 1
07/28/2006

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Term
how many bonds does carbon always make?
Definition
four
Term
what is the exception to carbon always making four bonds?
Definition
co
Term
two reasons carbon is so special:
Definition
can form 4 covalent bonds and bonds with other carbon atoms in a straight chain or ring
Term
what kind of bonds do organic molecules form?
Definition
covalent or polar-covalent
Term
what kind of bonds do organic molecules never form?
Definition
ionic
Term
can carbon form quadrupal bonds?
Definition
no, just single, double and triple
Term
other elements commonly found in organic molecules?
Definition
hydrogen, nitrogen and oxygen
Term
each central atom has a specific
Definition
3-d shape
Term
what was the first synthesized organic molecule?
Definition
urea
Term
who synthesized urea?
Definition
frederick wohler
Term
what makes carbon able to form four equivelent bonds?
Definition
hybridization
Term
what does hybridization allow carbon to do?
Definition
form long chains and rings structures
Term
isomers
Definition
same molecular formula different compounds
Term
why do structuralisomers have different physical properties?
Definition
because they are connected in a different order
Term
another name for structural isomers?
Definition
constitutional isomers
Term
functional groups
Definition
structural elements with characteristic arrangement of atoms and similar chemical properties
Term
what determines the characteristics of organic molecules?
Definition
functional groups
Term
three types of structural formulas?
Definition
molecular, lewis structures, condensed structural formulas
Term
hydrocarbons contain only
Definition
carbon and hydrogen
Term
four most simple types of hydrocarbons:
Definition
alkanes, alkenes, alkynes, aromatics
Term
alkanes
Definition
only single bonds
Term
alkenes
Definition
at least one double bonds
Term
alkynes
Definition
at least one triple bond
Term
aromatics
Definition
six carbon rings
Term
alkanes only contain
Definition
carbon and hydrogen
Term
what is possible if an alkane has more than three carbons
Definition
constitutional isomers
Term
branches and straight chain alkanes are
Definition
constitutional isomers
Term
isomers have different
Definition
configurations
Term
configuration
Definition
bonds must be broken to change shape
Term
conformations
Definition
different structures of the same compounds
Term
can you twist a double bond?
Definition
no only a single bond
Term
are conformations malleable
Definition
yes, different conformations are achieved by rotating around single bonds
Term
configurations are not changeable unless
Definition
bonds are broken and reformed
Term
prefixes denote
Definition
the number and identity of attached groups
Term
root word denotes
Definition
longest carbon chain
Term
ending denotes
Definition
functional class (alkane, alkene, etc)
Term
how can main groups be modified?
Definition
by the addition of substituents
Term
during modification you lose an atom but the (blank) is maintained
Definition
bond
Term
first step when naming organic molecules
Definition
find and name the longest contiual carbon chain
Term
the main chain is what part of the name?
Definition
the root
Term
which carbon is number one?
Definition
the carbon closest to a branch
Term
second step when naming organic molecules
Definition
identify each substituent
Term
number each substituent according to
Definition
where it is attached to the main chain
Term
if there are two or more substituents attahed to the same carbon of the main chain...
Definition
they each get the same number
Term
will you find metal in organic compounds
Definition
no
Term
why are alkanes saturated?
Definition
the max number of carbons are attached
Term
general formula for cycloalkanes
Definition
C(n) H(2n)
Term
the smallest cycloalkanes have (blank) carbons
Definition
three
Term
why are three and four carbon rings strained?
Definition
because the bond angles are less than 110 degrees
Term
what do you include in line structures of cyclalkanes?
Definition
bonds and elements beside carbon and hydrogen
Term
how do you decide which carbon is number one on the cycloalkane?
Definition
start alphabetically
Term
is free rotation possible in a cyclic compound?
Definition
no
Term
two commonly seen conformations of cyclohexane
Definition
chair and boat
Term
which is the more stable cycloalkane, the chair or the boat?
Definition
the chair
Term
what are the bond angles in a cyclohexane?
Definition
about 110 degrees
Term
because rings have fixed structures it is possible for substituents to
Definition
be on different sides
Term
to distinguish whether or not the substituents are on the same side, you use these two prefixes
Definition
cis and trans
Term
are alkanes polar or nonpolar
Definition
nonpolar
Term
are alkanes soluble in water
Definition
no
Term
alkanes density more or less than water
Definition
less
Term
physical properties of alkanes
Definition
colorless, tasteless
Term
are alkanes toxic
Definition
no
Term
are alkanes flammable
Definition
yes
Term
are alkanes reactive
Definition
nor very
Term
alkane intermolecular forces are
Definition
london dispersion
Term
combustion
Definition
the rapid reaction of another compound with oxygen that produces heat and light
Term
the products of combustion are always
Definition
water and carbon dioxide
Term
hybrid orbital
Definition
a combination of the 2s and 2p orbitals that allows carbon to make four bonds that are equivelent
Term
structural formulas show all
Definition
covalent bonds
Term
what are the simplest of all organic compounds?
Definition
hydrocarbons
Term
another word for saturated hydrocarbons
Definition
alkanes
Term
three types of unsaturated hydrocardbons
Definition
alkenes, alkynes, and aromatics
Term
what kind of hydrocarbons are not common in the human body?
Definition
alkanes
Term
general formula for alkanes
Definition
C(2)H(2n+2)
Term
what is the simplest alkane
Definition
methane
Term
what are the bond angles of a tetrahedral?
Definition
110 degrees
Term
two types of alkanes
Definition
normal and branched
Term
what does the prefix n mean?
Definition
indicates that all carbons form an unbranched chain
Term
alkyl groups
Definition
a collection of atoms that can be thought of as an alkane minus one hydrogen atom
Term
why do alkanes have a lower melting and boiling point than other organic molecules
Definition
because they have very weak nonpolar bonds
Term
homologous series
Definition
any series of compounds in which each member differs from the previous member only be having an additional CH2 unit
Term
dispersion forces increase as (blank) increases
Definition
molecular weight
Term
one to four carbons
Definition
gas
Term
five to twenty carbons
Definition
liquid
Term
more than twenty carbons
Definition
waxy solid
Term
what are the least reactive of all organic compounds?
Definition
alkanes
Term
what are the products of incomplete combustion
Definition
co and c
Term
what causes incomplete combustion
Definition
lack of oxygen
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