‫ﺒﺴﻡ ﺍﷲ ﺍﻟﺭﺤﻤﻥ ﺍﻟﺭﺤﻴﻡ‬
King Saud University
College of Science
Chemistry Department
25/12/1431H
First Mid Term Exam 1431/1432H (2010/2011G)
Chem 323
Answer the three following questions in the one hour allowed
(You may consult the attached Periodic Table)
time
I) Sketch the Latimer diagram for vanadium in acid medium showing the following:
1) The series of oxidation states.
2) The reducing systems and the standard potentials for each step.
3) The dn value for each oxidation state.
(6 marks)
II) Give the full name for the short named orbital dz2 and explain why does it differ in
shape from the four other d-orbitals.
(4 marks)
III) According to Slater rules for electron shielding, calculate Z* for the following
electron:
1) The valence electron in Te.
2) The valence electron in Ru.
3) The 5d electron in Pt.
4) The valence electron in Hg.
5) The 4f electron in Sm.
(Write down clearly your calculation procedure for each case, otherwise No
mark will be given).
(10 marks)
King Saud University
Science College
Chemistry Department
Second Mid Term Exam 1431/1432H (2010/2011G)
Chem 323
Answer all three questions within the one hour allowed
You may consult the attached Periodic Table
time
Student Name:
University Number:
Serial Number:
I: According to IUPAC rules, write the Werner formula for each of the following
complexes and state the number of ionizable ions when the complex is dissolved.
1) Tetraamminecobalt(III)-µ-amido-µ-nitrotetraamminecobalt(III) Phosphate
ion
2) Hexaamminecobalt(III) Hexachloroplatinate(IV)
ion
3) Potassium Ethylenediaminetetraacetatocobaltate(III)
ion
II: According to IUPAC, Name each of the following three complexes:
N
1)
C
S
(en)2Co Cr(acac)2 (NO3)2
N
C
S
2)
CH3
C
O
O
(H2O)3Cu Cu(H2O)3
O
O
C
CH3
3) [(SCN)3(H2O)2Cr
H
O
Co(NH3)5]SO4
III: Write down the d-orbitals configuration and the related number of electrons for
each of the following strong field complexes. Calculate in Dq the ligand field
stabelization energy of each complex.
1) [Pt(CN)6]2Dq
2) [Ni(CN)5]3-
C4v
Dq
3) [Fe(CN)5]2-
D3h
Dq
King Saud University
Science College
Chemistry Department
Final Exam 1431/1432H (2010/2011G)
Chem 323
Answer all questions on the Six attached sheets within the
three hours allowed time
(You may consult any of the two attached Tables)
Student Name:
University Number:
Serial Number:
Final Exam Mark
Total Mid Term Exams Mark
،‫ ﻭﻋﺩﺩ ﺃﻭﺭﺍﻕ ﺍﻷﺴﺌﻠﺔ ﺴﺘﺔ‬،‫ ﻋﺩﺩ ﺍﻷﻭﺭﺍﻕ ﺍﻟﻜﻠﻴﺔ ﻋﺸﺭﺓ‬:‫ﻤﻼﺤﻅﺔ‬
.‫ﻱ ﻤﻥ ﺃﻭﺭﺍﻕ ﻫﺫﺍ ﺍﻻﺨﺘﺒﺎﺭ‬
ٍ ‫ﻭﻴﻤﻨﻊ ﻤﻨﻌﺎ ﺒﺎﺘﺎ ﻨﺯﻉ ﺃ‬
Sheet I
According to Slater’s Rules for electron-shielding, calculate Z* for the following:
a) The 3d electron of Fe2+ ion
Z* =
b) The 4p electron of Se atom
Z* =
c) The 4d electron of Ag atom
Z* =
d) The 5s electron of Te atom
Z* =
e) The 4f electron of Eu atom
Z* =
f) The 6p electron of Pb atom
Z* =
g) The 4d electron of Sn4+ ion
Z* =
h) The 4f electron of Ho3+ ion
Z* =
i) The 5d electron of Os5+ ion
Z* =
j) The 4d electron of Rh4+ ion
Z* =
Sheet II
According to IUPAC, Name the following five complexes:
[Ag(CH3NH2)2][Mn(H2O)2(C2O4)2]
NH4[Cr(NH3)2(NCS)4]
[Pt(NH3)4][PtCl4]
[Pt(NH3)(CH3NH2)ClBr]
H
[(NH3)4Cr
N
O
H
H
Fe(NH2CH2CH2NH2)](SO4)2
Sheet III
Write Werner’s Formula for each of the following complexes and state the number of
the ionizable particles to which they are dissociated when dissolved:
Tetraamminecobalt(III)-µ-trihydroxotetraamminecobalt(III) Sulfate
ion
Calcium Dithiosulfatoargentate(I)
ion
Triamminechloro(ethylene)nitroplatinum(IV) Phosphate
ion
Aluminum Hexacyanoplatinate(IV)
ion
Barium Dibromodioxalatocobaltate(III)
ion
Sheet IV
For the following seven complexes, write down the electron configuration of the
splitted d-orbailas and also calculate the emperical ∆ value for each complex (in cm-1
unit).
1) [Pt(CN)4]
D4h
Configuration:
cm-1
∆ value =
2) [Ni(CN)5]3-
C4v
S.F.
Configuration:
cm-1
∆ value =
3) [MnCl5]3-
C4v
W.F.
Configuration:
cm-1
∆ value =
4) [CuBr5]3-
D3h
Configuration:
cm-1
∆ value =
5) [FeCl5]3-
D3h
W.F.
Configuration:
cm-1
∆ value =
6) [ReF7]2-
D5h
S.F.
Configuration:
cm-1
∆ value =
7) [V(CN)7]4-
D5h
Configuration:
∆ value =
cm-1
Sheet V
For the following ten complexes, state which could be subjected to the ground state
Jahn Teller distortion (Yes) and which are not subjected to that effect (No). (Each
wrong marking takes one write marking out). Calculate also for each complex the
magnitude of µspin only in B.M. units:
Complex
J.T. distortion
µspin only
In BM
[VBr4]1-
W.F.
[CoCl4]2-
W.F
[MnCl6]4-
W.F.
[CrCl6]4-
W.F.
[TiCl6]3-
W.F.
[[Ni(H2O)6]2+
W.F.
[VCl4]2-
W.F.
[Co(NH3)6]3+
S.F.
[Fe(CN)6]3-
S.F.
[MnF6]3-
W.F.
Sheet VI
For the following Free Ions, calculate the value of µS+L in B.M. unit.
1- Pd3+
: µS+L :
B.M
2- Pt4+
: µS+L :
B.M
3- Sm3+
: µS+L :
B.M
4- Ru4+
: µS+L :
B.M
5- Gd3+
: µS+L :
B.M
6- W4+
: µS+L :
B.M
7- Ho3+
: µS+L :
B.M
8- Ir4+
: µS+L :
B.M
9- Yb3+
: µS+L :
B.M
10- Mo3+
: µS+L :
B.M
………………………………………………………………………………………….
………………………………………………………………………………………….
………………………………………………………………………………………….
………………………………………………………………………………………….
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………………………………………………………………………………………….
King Saud University
Science College
Chemistry Department
Second Semister Second Mid Term Exam 1431/1432H (2010/2011G)
Chem 323
Answer all three questions within the one hour allowed
You may consult the attached Periodic Table
Student Name:
University Number:
Serial Number:
I) According to IUPAC, name the following complexes:
H
O
1) [(SCN)3(H2O)2Cr
Co(NH3)5]SO4
2) Al2[Cr(NH2CH2COO)(C2O4)2]3
time
II) Give the Werner's formula for each of the following complexes and state the
number of ionizable ions in each.
1) Diaquobis(ethylenediamine)cobalt(III) Amminepentanitritocobalt(III)
Number of ionizable ions = ……
2) Diammine(ethylenediamine)chromium(III)µ-bis(dioxygen)
tetramminecobalt(III) bromide
Number of ionizable ions = ……
3) Calcium Dithiosulfatoargentate(I)
Number of ionizable ions = ……
III) According to Slater's rule, calculate the value of Z* of each ion from the
following compounds.
1) [Ni(CO)4]
2) [Pt(NH3)2Cl2]
3) [Rh(NH3)6]PO4
King Saud University
Science College
Chemistry Department
13/7/1432H
Final Exam – Second Semester 1431/1432H (2010/2011G)
Chem 323
Answer all questions on the Five attached sheets within the
three hours allowed time
(You may consult any of the two attached Tables)
Student Name:
University Number:
Serial Number:
Final Exam Mark
Total Mid Term Exams Mark
،‫ ﻭﻋﺩﺩ ﺃﻭﺭﺍﻕ ﺍﻷﺴﺌﻠﺔ ﺨﻤﺴﺔ‬،‫ ﻋﺩﺩ ﺍﻷﻭﺭﺍﻕ ﺍﻟﻜﻠﻴﺔ ﺜﻤﺎﻨﻴﺔ‬:‫ﻤﻼﺤﻅﺔ‬
.‫ﻱ ﻤﻥ ﺃﻭﺭﺍﻕ ﻫﺫﺍ ﺍﻻﺨﺘﺒﺎﺭ‬
ٍ ‫ﻭﻴﻤﻨﻊ ﻤﻨﻌﺎ ﺒﺎﺘﺎ ﻨﺯﻉ ﺃ‬
Sheet I
According to Slater’s Rules for electron-shielding, calculate Z* for the following:
k) The 3d electron of Fe2+ ion
Z* =
l) The 5s electron of Ag atom
Z* =
m) The 4f electron of Eu atom
Z* =
n) The 4d electron of Sn4+ ion
Z* =
o) The 5d electron of Os5+ ion
Z* =
(10 marks)
Sheet II
According to IUPAC, Name the following five complexes:
[Ag(NH3)2][Mn(H2O)2(C2O4)2]
Ba[Cr(NH3)2(NCS)4]2
[Pt(NH2CH2CH2NH2)2][PtCl4]
[Pt(CH3NH2)Cl2]
H
[(NH3)4Cr
N
O
H
H
Fe(NH2CH2CH2NH2)2]3(PO4)4
(10 marks)
Sheet III
Write Werner’s Formula for each of the following complexes:
Tetraamminecobalt(III)-µ-trihydroxotetraamminecobalt(III) Sulfate
Calcium Dithiosulfatoargentate(I)
Triamminechloro(ethylene)nitroplatinum(IV) Phosphate
Aluminum Hexacyanoplatinate(IV)
Barium Dibromodioxalatocobaltate(III)
(10 marks)
Sheet IV
For the following seven complexes, write down the electron configuration of the
splitted d-orbitals and also calculate the emperical ∆ value for each complex (in cm-1
unit).
1) [Ni(CN)4]2-
D4h
Configuration:
cm-1
∆ value =
2) [Co(CN)5]2-
C4v
S.F.
Configuration:
cm-1
∆ value =
3) [CrCl5]3-
C4v
W.F.
Configuration:
cm-1
∆ value =
4) [NiBr5]3-
D3h
W.F.
Configuration:
cm-1
∆ value =
5) [Re(CN)5]1-
D3h
S.F.
Configuration:
cm-1
∆ value =
6) [MoF7]2-
D5h
Configuration:
cm-1
∆ value =
7) [Rh(CN)7]4-
D5h
S.F.
Configuration:
∆ value =
cm-1
(10 marks)
Sheet V
For the following Free Ions, calculate the value of µS+L in B.M. unit.
1- Pd3+
: µS+L :
B.M
2- Pt4+
: µS+L :
B.M
3- Sm3+
: µS+L :
B.M
4- Ru4+
: µS+L :
B.M
5- Gd3+
: µS+L :
B.M
6- W4+
: µS+L :
B.M
7- Ho3+
: µS+L :
B.M
8- Ir4+
: µS+L :
B.M
9- Yb3+
: µS+L :
B.M
10- Mo3+
: µS+L :
B.M
(20 marks)
‫ﺒﺴﻡ ﺍﷲ ﺍﻟﺭﺤﻤﻥ ﺍﻟﺭﺤﻴﻡ‬
‫ﺠﺎﻤﻌﺔ ﺍﻟﻤﻠﻙ ﺴﻌﻭﺩ‬
‫ﻜﻠﻴﺔ ﺍﻟﻌﻠﻭﻡ – ﻗﺴﻡ ﺍﻟﻜﻴﻤﻴﺎﺀ‬
‫ﻫـ‬١٤٣٢/٥/٢٦
First Mid Term Exam, Second semester, 1431/1432H (2010/2011G)
Chem 323
Answer the two following questions within the one hour allowed
(You may consult the attached Periodic Table)
I)
time
One of the two following complexes is paramagnetic while the other is
diamagnetic.
[Ni(CN)4]2-
,
[NiCl4]2-
Explain and define each of the following for each compound.
a) The type of symmetry.
b) The hyberdization (nominate the orbitals).
c) The d-orbital configuration.
d) The value of the crystal field stabilization energy in units of Dq.
II)
For the following three strong field octahedral complexes
[W(CN)6]3-
,
[Ir(CN)6]3-
and
:
[Pt(CN)6]3-
i.
Compare the magnitude of the Metal-ligand bond length.
ii.
State three of the main factors that will affect the metal-ligand bond
length and show how these factors varry for the given complexes.