69. The MO of the ground state of a heteronuclear diatomic molecule AB is /mol CAPA + CR4 %3D If a bonding electron spends 90% of its time in an orbital o* on atom A and 10% of its time in o" on atom B, what are the values of CA and CB? (Neglect the overlap of the two orbitals.) B

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question 69 and 70 from principles of modern chemistry
order is predicted by the MO model for the N-O bonds in
hybridization of the central N atom, and the geometry of
linear?
nalysis
the
the jon, Show how the use of resonance structures can b
avoided by introducing a de-localized MO. What b De
NO,).
is ion.
the nitrate ion?
for the
Is, and
ading.
cupied
stance
molecule, indicating the occupied MOs. If the lowest energy
MO has the form C + C24, do you expect C2 to be
larger or smaller than C?
* 69. The MO of the ground state of a heteronuclear diatomic
molecule AB is
Umol
CAPA + CROB
nufac-
ne car-
ectron
order?
If a bonding electron spends 90% of its time in an orbital
* on atom A and 10% of its time in o° on atom B, what
are the values of CA and CB? (Neglect the overlap of the two
orbitals.)
dicates
cule is
70. The stable molecular ion H is triangular, with H-H
distances of 0.87 Å. Sketch the molecule and indicate the
region of greatest electron density of the lowest energy MO.
It has
energy
* 71. According to recent spectroscopic results, nitramide
-nfigu-
cheory
nding
O2 in
le the-
H
N-N
H2) is
hat of
is a nonplanar molecule. It was previously thought to be
planar.
(a) Predict the bond order of the N-N bond in the nonpla-
tomic
nar structure.
lity of
g and
(b) If the molecule really were planar after all, what would
be the bond order of the N-N bond?
e ion-
F and
12. trans-tetrazene (N,H4) consists of a chain of four nitro-
gen atoms with each of the two end atoms bonded to two
hydrogen atoms. Use the concepts of steric number alld
Transcribed Image Text:order is predicted by the MO model for the N-O bonds in hybridization of the central N atom, and the geometry of linear? nalysis the the jon, Show how the use of resonance structures can b avoided by introducing a de-localized MO. What b De NO,). is ion. the nitrate ion? for the Is, and ading. cupied stance molecule, indicating the occupied MOs. If the lowest energy MO has the form C + C24, do you expect C2 to be larger or smaller than C? * 69. The MO of the ground state of a heteronuclear diatomic molecule AB is Umol CAPA + CROB nufac- ne car- ectron order? If a bonding electron spends 90% of its time in an orbital * on atom A and 10% of its time in o° on atom B, what are the values of CA and CB? (Neglect the overlap of the two orbitals.) dicates cule is 70. The stable molecular ion H is triangular, with H-H distances of 0.87 Å. Sketch the molecule and indicate the region of greatest electron density of the lowest energy MO. It has energy * 71. According to recent spectroscopic results, nitramide -nfigu- cheory nding O2 in le the- H N-N H2) is hat of is a nonplanar molecule. It was previously thought to be planar. (a) Predict the bond order of the N-N bond in the nonpla- tomic nar structure. lity of g and (b) If the molecule really were planar after all, what would be the bond order of the N-N bond? e ion- F and 12. trans-tetrazene (N,H4) consists of a chain of four nitro- gen atoms with each of the two end atoms bonded to two hydrogen atoms. Use the concepts of steric number alld
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