8/9/2019 Taller I - Simetría e Introducción Coordinación (1)

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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.