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1st exam
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22
Organic Chemistry
Undergraduate 2
09/26/2013

Additional Organic Chemistry Flashcards

 


 

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Term
Torsional Strain
Definition
change in energy resulting from bond rotation from staggered to eclipsed isomers
Term
ring flip in cycloalkanes
Definition
changing equitorial H's to axial and axial h's to equitorial
Term
4 cyclohexane conformations in order of least stable to most stable
Definition
1. half-chair
2. boat
3. twisted boat
4. chair
Term
transannular strain
Definition
associated with steric repulsion, which is the "crowding" interaction of two groups ACROSS a ring
Term
draw a diagram of cyclohexane going through all its conformational isomers and the energy associated with each
Definition
http://www.google.com/imgres?sa=X&biw=1920&bih=971&tbm=isch&tbnid=VSRxPGV8qoPq5M:&imgrefurl=http://www.stolaf.edu/depts/chemistry/courses/toolkits/247/js/cyclohex/&docid=SKo1VWei7TH2bM&imgurl=http://www.stolaf.edu/depts/chemistry/courses/toolkits/247/js/cyclohex/cyclohex.gif&w=461&h=237&ei=rHdEUo_dO5Ci4AO--4HYBg&zoom=1&ved=1t:3588,r:2,s:0,i:87&iact=rc&page=1&tbnh=161&tbnw=313&start=0&ndsp=35&tx=151&ty=87
Term
relationship between size of constituients on monosubstituted cyclohexanes and desire to be be equitorial instead of axial
Definition
larger constituients on monosubstitued cyclohexane favor beign equitorial more than smaller consitutients
Term
IR spectroscopy data for C=O (carbon double bonded to oxygen)
Definition
about 1,750 cm-1
Term
proton donor
Definition
acid
Term
proton acceptor
Definition
base
Term
conjugate base
Definition
the species of A- that comes from dissocation of the conjugate acid, HA
Term
relationship between strength of a conjugate acid and base
Definition
the stronger an acid, the weaker its conjugate base and visa versa
Term
What Angle is assoicated with sp hybridization?
Definition
a 180 degree angle is associated with sp hybridization
Term
what angle is associated with sphybridization
Definition
a 120 degree angle is associated with sphybridization
Term
what angle is associated with sphybridization?
Definition
a 109.5 degree angle is associated with sp3 hybridization
Term
equation to find number of hyrdogens needed to saturate
Definition
Hsat=2*nc+2-nx-nn
Term
equation to find degree of unsaturation
Definition
Degrees of unsaturation= (Hsat - Hactual )/2
Term
IR wavelength absorbed for C=C
Definition
16500 cm-1
Term
range of IR wavelength abosrbed by C triple bonded to C
Definition
2200 cm-1
Term
range of IR wavelength abosorbed by C triple bonded to N
Definition
2200 cm-1
Term

range of IR wavelength absorbed by alchohol function group (O-H)

 

Definition
3400 cm-1
Term
IR wavelengths of O-H bond in carboxyl (C=O-H)
Definition
3000 cm-1
Term
change in enthalpy for an equation (ΔH°)
Definition
(Bonds Broken) - (Bonds Formed)
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