Question 1

The correct name of the neutral coordination complex shown below is

Accepted Answer

The answer of The correct name of the neutral coordination...

Question 2

A platinum coordination complex has the formula, [PtCl(NH₃)₂Br], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

Accepted Answer

The square planar geometry allows for two geometric isomers: one with the two NH3 groups adjacent (cis) and one with them opposite each other (trans).

Question 3

A platinum coordination complex has the formula, [Pt(Br)(Cl)(I)(NH₃ )], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

Accepted Answer

A square planar complex with four different ligands can have three geometric isomers.

Question 4

A platinum coordination complex has the formula, [PtBr(CN)₃]⁺, and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

Accepted Answer

The complex has a square planar geometry, which means that the four ligands are arranged in a plane around the central metal ion. The bromide ion and the three cyanide ions are all monodentate ligands, which means that they can only bond to the metal ion through one atom. This means that there are no geometric isomers of this compound.

Question 5

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₂(NH₃)₄]. How many geometric isomers of this compound should exist?

Accepted Answer

In an octahedral complex like [CoCl2(NH3)4], there are two possible geometric isomers: cis (where the two Cl ligands are adjacent) and trans (where the two Cl ligands are opposite each other).

Question 6

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₃(NH₃)₃]^-. How many geometric isomers of this compound should exist?

Accepted Answer

The complex ion has an octahedral geometry, which means that the six ligands are arranged around the central metal ion in an octahedron shape. This shape has three mutually perpendicular twofold axes, four threefold axes, and six mirror planes. The ligands can be arranged in different ways around these axes and planes, giving rise to different geometric isomers. In this case, there are two possible geometric isomers: a cis isomer and a trans isomer. The cis isomer has the three chloride ions and the three ammonia molecules arranged on the same side of the octahedron, while the trans isomer has the chloride ions and the ammonia molecules arranged on opposite sides of the octahedron.

Question 7

Which complex ion is a chiral isomer?

Accepted Answer

The complex [Co(en)₃]³⁺ is chiral because it has three bidentate ethylenediamine (en) ligands that can form non-superimposable mirror images, resulting in optical isomerism.

Question 8

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en)₂]⁺. How many geometric isomers of this compound should exist?

Accepted Answer

The answer of A coordination complex in which the ligands...

Question 9

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en)₂]⁺. How many isomers of this complex ion should exist?

Accepted Answer

The complex [CrCl2(en)2]+ can have cis and trans isomers. Additionally, the cis form can have two enantiomers, leading to a total of 3 isomers.

Question 10

The splitting of the d-orbitals of transition metals by a particular complex geometry gives rise to the pattern: ?  Which one of the following geometries produces the splitting pattern seen above?

Accepted Answer

The answer of The splitting of the d-orbitals of transition...

Question 11

A complex ion which has its absorption maximum in the blue region of the visible spectrum would appear to be ________ in color.

Accepted Answer

A complex ion that absorbs light in the blue region will appear in the complementary color, which is orange-yellow.

Question 12

A complex ion which has its absorption maximum in the red region of the visible spectrum would appear to be ________ in color.

Accepted Answer

A complex ion that absorbs light in the red region of the visible spectrum will appear green-blue, as this is the complementary color to red.

Question 13

Many coordination complexes are colored due to absorption of light in the visible region of the spectrum. Which one of the following coordination complexes of transition metals is not expected to be a colored complex?Hint: Electrons transitioning between occupied and unoccupied d-orbitals produce colors in metal complexes.

Accepted Answer

Zinc in Zn(NH₃)₄²⁺ has a completely filled d-orbital (d¹⁰), so there are no d-d transitions possible, making it colorless.

Question 14

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^- Based on this series, which of the following would absorb the highest energy light?

Accepted Answer

[Os(CN)₆]^4- would absorb the highest energy light because CN^- is the strongest field ligand in the spectrochemical series, leading to the largest splitting of d-orbitals and thus absorption of higher energy light.

Question 15

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^-> I^- Based on this series, which of the following would absorb the highest energy light?

Accepted Answer

The answer of The following order is observed in the...

Question 16

A Mo²⁺ ion has ________ 4d electrons.

Accepted Answer

The answer of A Mo²⁺ ion has ________ 4d electrons. ...

Question 17

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^- It was observed that for the two 6-coordinate cobalt complexes, CoF₆³ and Co(NH₃)₆³⁺, one is diamagnetic and one is paramagnetic. How many unpaired electrons are there in the paramagnetic complex ion?

Accepted Answer

The paramagnetic complex is CoF₆³⁻, which has 4 unpaired electrons because F⁻ is a weak field ligand, leading to high spin configuration.

Question 18

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^- How many unpaired electrons would you expect to find in the complex ion, Cr(CN)₆³ if the value of the splitting parameter is as large as it is in typical cyanide complexes?

Accepted Answer

The answer of The following order is observed in the...

Question 19

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^-Cr(NH₃)₆³⁺ and Ni(NH₃)₆²⁺ are both positively charged coordination complexes. Which statement describes the magnetic properties of the complexes?

Accepted Answer

The answer of The following order is observed in the...

Question 20

When bound to oxygen, the iron(II)found in a heme group has what coordination number?

Accepted Answer

When bound to oxygen, the iron(II) in a heme group has a coordination number of 6, as it is coordinated to four nitrogen atoms in the porphyrin ring, one nitrogen from a histidine residue, and one oxygen molecule.

Quiz 22: Metal Complexes

The correct name of the neutral coordination complex shown below is

A platinum coordination complex has the formula, [PtCl(NH₃) ₂Br], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [Pt(Br) (Cl) (I) (NH₃ ) ], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [PtBr(CN) ₃]⁺, and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₂(NH₃) ₄]. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₃(NH₃) ₃]^-. How many geometric isomers of this compound should exist?

Which complex ion is a chiral isomer?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en) ₂]⁺. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en) ₂]⁺. How many isomers of this complex ion should exist?

The splitting of the d-orbitals of transition metals by a particular complex geometry gives rise to the pattern: ? Which one of the following geometries produces the splitting pattern seen above?

A complex ion which has its absorption maximum in the blue region of the visible spectrum would appear to be ________ in color.

A complex ion which has its absorption maximum in the red region of the visible spectrum would appear to be ________ in color.

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^- Based on this series, which of the following would absorb the highest energy light?

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^-> I^- Based on this series, which of the following would absorb the highest energy light?

A Mo²⁺ ion has ________ 4d electrons.

When bound to oxygen, the iron(II) found in a heme group has what coordination number?

Quiz 22: Metal Complexes

The correct name of the neutral coordination complex shown below is

A platinum coordination complex has the formula, [PtCl(NH3) 2Br], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [Pt(Br) (Cl) (I) (NH3 ) ], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [PtBr(CN) 3]+, and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl2(NH3) 4]. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl3(NH3) 3]-. How many geometric isomers of this compound should exist?

Which complex ion is a chiral isomer?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl2(en) 2]+. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl2(en) 2]+. How many isomers of this complex ion should exist?

The splitting of the d-orbitals of transition metals by a particular complex geometry gives rise to the pattern: ? Which one of the following geometries produces the splitting pattern seen above?

A complex ion which has its absorption maximum in the blue region of the visible spectrum would appear to be ________ in color.

A complex ion which has its absorption maximum in the red region of the visible spectrum would appear to be ________ in color.

The following order is observed in the spectrochemical series for ligands CN- > NO2- > en > NH3 > H2O > C2O42- > OH- > F- > Cl- > Br- > I- Based on this series, which of the following would absorb the highest energy light?

The following order is observed in the spectrochemical series for ligands CN- > NO2- > en > NH3 > H2O > C2O42- > OH- > F- > Cl- > Br- > I- Based on this series, which of the following would absorb the highest energy light?

A Mo2+ ion has ________ 4d electrons.

The following order is observed in the spectrochemical series for ligands CN- > NO2- > en > NH3 > H2O > C2O42- > OH- > F- > Cl- > Br- > I-Cr(NH3) 63+ and Ni(NH3) 62+ are both positively charged coordination complexes. Which statement describes the magnetic properties of the complexes?

When bound to oxygen, the iron(II) found in a heme group has what coordination number?

A platinum coordination complex has the formula, [PtCl(NH₃) ₂Br], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [Pt(Br) (Cl) (I) (NH₃ ) ], and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A platinum coordination complex has the formula, [PtBr(CN) ₃]⁺, and exhibits a square planar geometry. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₂(NH₃) ₄]. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CoCl₃(NH₃) ₃]^-. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en) ₂]⁺. How many geometric isomers of this compound should exist?

A coordination complex in which the ligands exhibit an octahedral geometry about the central metal ion has the formula, [CrCl₂(en) ₂]⁺. How many isomers of this complex ion should exist?

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^- > I^- Based on this series, which of the following would absorb the highest energy light?

The following order is observed in the spectrochemical series for ligands CN^- > NO₂^- > en > NH₃ > H₂O > C₂O₄²^- > OH^- > F^- > Cl^- > Br^-> I^- Based on this series, which of the following would absorb the highest energy light?

A Mo²⁺ ion has ________ 4d electrons.