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QUÍMICA INORGÁNICA IITALLER - SIMETRÍA MOLECULAR E INTRODUCCIÓN A LA QUÍMICA DE
COORDINACIÓN
1)Which of the following does not contain a C
3 axis?
POCl 3
[NH 4 ] +
[H 3O] +
ClF3
2) Which of the following symmetry elements does contain cis-N 2 F 2 ?
a C 2 axis
a h plane
an inversion center
an S 2 axis
3) Which two species belong to the same point group?
XeF 2 and OF 2
H2O and CO 2
H2S and OF 2
[NO 2 ] + and [NO 2 ]–
4) Which of the following belongs to the C 3v point group?
SO 3
BBr 3
NH3 AlCl3
5) Which molecule does not have T d symmetry?
SiF 4
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P4
CH4
XeF 4
6) SO 2 belongs to which point group?
C 2v
C 2
D ∞h
C 2h
7) Which of the following molecules or ions possesses an inversioncenter (center of symmetry)?
[PF 6 ]–
SiH 4
BF3
PF5
8) Which of the following molecules or ions belongs to the C 4v point group?
SF 5Cl
[BH 4 ]–
XeF 4
trans -WCl 2 F4
9) Which statement is true about the change in symmetry ongoing from BF 3 to [BF 4 ]
–
?
The point group changes from D 3h to T d
The point group changes from C 3v to T d
The point group changes from D 3h to D 4h
The point group changes from D 3h to C 3v
10) The number of degrees of vibrational freedom possessed by CH 4 is:
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10
6
4
9
Enantiomers of [Cr(ox) 3 ] 3–
are: 11)stereoisomers.
geometrical isomers.
structural isomers.
related by a rotation axis.
How many isomers are there of octahedral [CrCl2(H
2O)
4] + and
octahedral [CoCl 2 (en) 2 ] + ? 12)
2 for [CrCl 2 (H 2O) 4 ] + ; 2 for [CoCl 2 (en) 2 ] +
2 for [CrCl 2 (H 2O) 4 ] + ; 3 for [CoCl 2 (en) 2 ] +
3 for [CrCl 2 (H 2O) 4 ] + ; 3 for [CoCl 2 (en) 2 ] +
3 for [CrCl 2 (H 2O) 4 ] + ; 2 for [CoCl 2 (en) 2 ] +
13) Deduzca la fórmula de cada uno de los siguientes compuestos de coordinación:(a) Bromuro de hexaaminocromo (III).(b) Tetracianonicolato(II) de potasio.(c) Hexacianoferrato(II) de hierro (II)(d) Cloruro de tetraacuodiclorocromo(III) dihidratado
14) Nombre sistemáticamente cada uno de los siguientes compuestos de coordinación:(a) [Co(NH 3)5(OH 2)]Br 3 (b) (NH 4)2[Cu(Cl) 4](c) [Co(SCN) 2(OH 4)](NCS).3H 2O(d) [Cu(NH 3)4] (ClO 4)2
15) Dibuje los tres isómeros del [Fe(acac) 2(OH 2)2]Cl octaédrico y para cada unomencione qué tipo de isomería experimenta.