Textbook Question
What is the systematic name for each of the following coordination compounds?
(c) K3[Fe(C2O4)3]
(d) [Co(en)2(NH3)CN]Cl2
152
views
Ch.21 - Transition Elements and Coordination Chemistry
McMurry8th EditionChemistryISBN: 9781292336145
Not the one you use?Change textbookSelect a different textbook
Table of contents
- Ch.1 - Chemical Tools: Experimentation & Measurement143
- Ch.2 - Atoms, Molecules & Ions134
- Ch.3 - Mass Relationships in Chemical Reactions149
- Ch.4 - Reactions in Aqueous Solution157
- Ch.5 - Periodicity & Electronic Structure of Atoms92
- Ch.6 - Ionic Compounds: Periodic Trends and Bonding Theory73
- Ch.7 - Covalent Bonding and Electron-Dot Structures47
- Ch.8 - Covalent Compounds: Bonding Theories and Molecular Structure51
- Ch.9 - Thermochemistry: Chemical Energy104
- Ch.10 - Gases: Their Properties & Behavior138
- Ch.11 - Liquids & Phase Changes43
- Ch.12 - Solids and Solid-State Materials56
- Ch.13 - Solutions & Their Properties98
- Ch.14 - Chemical Kinetics79
- Ch.15 - Chemical Equilibrium107
- Ch.16 - Aqueous Equilibria: Acids & Bases94
- Ch.17 - Applications of Aqueous Equilibria125
- Ch.18 - Thermodynamics: Entropy, Free Energy & Equilibrium66
- Ch.19 - Electrochemistry130
- Ch.20 - Nuclear Chemistry73
- Ch.21 - Transition Elements and Coordination Chemistry122
- Ch.22 - The Main Group Elements155
- Ch.23 - Organic and Biological Chemistry43
Chapter 21, Problem 88
Which of the following complexes are chiral?
(a) Pt(en)Cl2
(b) cis-[Co(NH3)4Br2]+
(c) cis-[Cr(en)2(H2O)2]3+
(d) [Cr(C2O4)3]3-
Verified step by step guidance1
Identify the geometry of each complex. For example, determine if the complex is octahedral, square planar, or tetrahedral.
Determine if the complex has a plane of symmetry or a center of symmetry. A chiral complex will lack these symmetries.
For each complex, consider the ligands and their arrangement around the central metal atom. Check if swapping any two ligands results in a non-superimposable mirror image.
Examine the specific ligands: 'en' (ethylenediamine) is a bidentate ligand that can create chiral centers, while 'C2O4' (oxalate) is also bidentate but can form symmetrical structures.
Analyze each complex: (a) Pt(en)Cl2 is square planar and typically not chiral; (b) cis-[Co(NH3)4Br2]+ is octahedral and can be chiral if it lacks symmetry; (c) cis-[Cr(en)2(H2O)2]3+ is octahedral and can be chiral due to the arrangement of bidentate ligands; (d) [Cr(C2O4)3]3- is octahedral and typically not chiral due to symmetrical arrangement of oxalate ligands.
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chirality
Chirality refers to the geometric property of a molecule that makes it non-superimposable on its mirror image, much like left and right hands. A chiral molecule typically has an asymmetric carbon atom, but in coordination complexes, chirality can arise from the arrangement of ligands around a central metal atom. Identifying chirality is crucial for understanding the optical activity and potential biological interactions of the complexes.
Recommended video:
Guided course
02:37
Chirality
Coordination Complexes
Coordination complexes consist of a central metal atom bonded to surrounding molecules or ions called ligands. The geometry of these complexes can vary, influencing their properties, including chirality. Understanding the coordination number and the spatial arrangement of ligands is essential for determining whether a complex is chiral or achiral.
Recommended video:
Guided course
00:43Coordination Complexes Example
Geometric Isomerism
Geometric isomerism occurs when compounds have the same molecular formula but differ in the spatial arrangement of their atoms. In coordination chemistry, this can manifest as cis and trans isomers, which can have different properties, including chirality. Recognizing these isomers is vital for analyzing the chirality of the given complexes in the question.
Recommended video:
Guided course
02:02Geometric Isomers
Related Practice
Textbook Question
Write the formula for each of the following compounds.
(c) Hexacarbonylmolybdenum(0)
(d) Diamminebis(ethylenediamine)chromium(III) chloride
89
views
Textbook Question
The reaction of the octahedral complex Co(NH3)3(NO2)3 with HCl yields a complex [Co(NH3)3(H2O)Cl2]+ in which the two chloride ligands are trans to one another.
(a) Draw the two possible stereoisomers of the starting material [Co(NH3)3(NO2)3]. (All three NO2- ligands are bonded to Co through the N atom.)
(b) Assuming that the NH3 groups remain in place, which of the two starting isomers could give rise to the observed product?
102
views
Textbook Question
Consider the octahedral complex [Co(en)(dien)Cl]2+, where dien = H2NCH2CH2NHCH2CH2NH2, which can be abbreivated
(a) The dien (diethylenetriamine) ligand is a tridentate ligand. Explain what is meant by 'tridentate' and why dien can act as a tridentate ligand.
(b) Draw all possible stereoisomers of [Co(en)(dien)Cl]2+ (dien is a flexible ligand). Which stereoisomers are chiral, and which are achiral?
117
views
Textbook Question
Tris(2-aminoethyl)amine, abbreviated tren, is the tetradentate ligand N(CH2CH2NH2)3. Using to represent each of the three NCH2CH2NH2 segments of the ligand, sketch all possible isomers of the octahedral complex [Co(tren)BrCl]+.
86
views
Textbook Question
Write the formula for each of the following compounds.
(a) Tetraammineplatinum(II) chloride
(b) Sodium hexacyanoferrate(III)
108
views