Skip to main content
Ch.21 - Transition Elements and Coordination Chemistry
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145당신이 사용하는 게 아니라요?교과서 변경
모든 교과서McMurry 8th EditionCh.21 - Transition Elements and Coordination Chemistry문제 21.107
21장, 문제 21.107

Draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons for each of the following.
(a) [Cu(en)3]2+
(b) [FeF6]2-
(c) [Co(en)3]3+ (low spin) 

검증된 단계별 안내
1
Identify the oxidation state and electron configuration of the central metal ion for each complex.
Determine the geometry and crystal field splitting pattern (octahedral or tetrahedral) for each complex.
For each complex, draw the crystal field energy-level diagram, showing the splitting of the d-orbitals.
Assign the electrons to the d-orbitals according to the electron configuration and the crystal field splitting pattern.
Count the number of unpaired electrons in the d-orbitals for each complex.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Crystal Field Theory

Crystal Field Theory (CFT) explains how the arrangement of ligands around a central metal ion affects the energy levels of its d-orbitals. In an octahedral field, for example, the d-orbitals split into two energy levels: the lower-energy t2g and the higher-energy eg orbitals. This splitting is crucial for determining the electronic configuration of transition metal complexes and predicting their magnetic properties.
추천 영상:
가이드 코스
01:18
The study of ligand-metal interactions helped to form Ligand Field Theory which combines CFT with MO Theory.

Electron Configuration and Orbital Filling

The electron configuration of a transition metal complex is determined by the number of d-electrons and the ligand field strength. Electrons fill the lower energy orbitals first, following Hund's rule and the Pauli exclusion principle. Understanding how to assign electrons to the split d-orbitals based on the ligand type (strong or weak field) is essential for predicting the number of unpaired electrons in a complex.
추천 영상:
가이드 코스
02:15
Electron Orbital Diagrams

Magnetic Properties of Transition Metal Complexes

The magnetic properties of transition metal complexes are influenced by the presence of unpaired electrons. Complexes with unpaired electrons exhibit paramagnetism, while those with all paired electrons are diamagnetic. By analyzing the electron configuration derived from the crystal field energy-level diagram, one can predict whether a complex will be paramagnetic or diamagnetic, which is important for understanding its chemical behavior.
추천 영상:
가이드 코스
03:12
Transition Metals
관련 실천
교과서 질문

The amount of paramagnetism for a first-series transition metal complex is related approximately to its spin-only magnetic moment. The spin-only value of the magnetic moment in units of Bohr magnetons (BM) is given by sqrt(n(n + 2)), where n is the number of unpaired electrons. Calculate the spin-only value of the magnetic moment for the 2+ ions of the first-series transition metals (except Sc) in octahedral complexes with (a) weak-field ligands and (b) strong-field ligands. For which electron configurations can the magnetic moment distinguish between high-spin and low-spin electron configurations?

99
views
교과서 질문

Look at the colors of the isomeric complexes in Figure 21.12, and predict which is the stronger field ligand, nitro (-NO2) of nitrito (-ONO). Explain. 

90
views
교과서 질문

Which of the following complexes are paramagnetic?

(a) [Mn(CN)6]3-

(b) [Zn(NH3)4]2+ (tetrahedral)

(c) [Fe(CN)6]4-

(d) [FeF6]4-

101
views
교과서 질문

Based on the wavelength of maximum absorption of the cobalt complexes, arrange the following ligands in a spectrochemical series from weakest-field to strongest-field ligand. 

(a) Cl- < NCS- < H2O < NH3 

(b) Cl- < NCS- < H2O < NH3 

(c) H2O < Cl- < NH3 < NCS-

(d) Cl- < H2O < NCS- < NH3

105
views
교과서 질문

For each of the following complexes, draw a crystal field energy-level diagram, assign the electrons to orbitals, and predict the number of unpaired electrons. 

(a) [CrF6]3-

(b) [V(H2O)6]3+

(c) [Fe(CN)6]3-

96
views
교과서 질문

What is the systematic name for each of the following coordination compounds? 

(c) [Co(NH3)4Br2]Br

(d) Cu(gly)2

170
views