Understanding the Nobel Prize in Chemistry and Coordination Theory

The question asks about the first Swiss chemist to receive the Nobel Prize in Chemistry in a specific year, 1913, and highlights their groundbreaking work on the linkage of atoms, particularly related to coordination theory. Identifying the correct chemist requires knowing the history of the Nobel Prize and key developments in chemistry during that period.

Analyzing the Options for the Nobel Prize Winner

Let's examine each option provided in the context of the question:

• Walter Heitler: Walter Heitler was a German physicist. While he made significant contributions to quantum mechanics and chemical bonding theory later in the 20th century, he was not Swiss and did not win the Nobel Prize in Chemistry in 1913. His work is associated with the development of quantum chemistry, not the early coordination theory.
• Charles Friedel: Charles Friedel was a French chemist known for his work with James Crafts on the Friedel-Crafts reactions, a fundamental set of reactions in organic chemistry. However, Charles Friedel died in 1899, well before the 1913 Nobel Prize was awarded.
• John Dalton: John Dalton was an English chemist and physicist famous for his pioneering work on modern atomic theory in the early 19th century. His contributions are foundational to chemistry, but he lived and worked long before the establishment of the Nobel Prize and the developments in coordination chemistry around the turn of the 20th century.
• Alfred Werner: Alfred Werner was a Swiss chemist. He was awarded the Nobel Prize in Chemistry in 1913. His most important contribution was the development of coordination theory, which explained the structure of coordination compounds. This theory revolutionized the understanding of the linkage of atoms, particularly around central metal atoms.

The Correct Answer: Alfred Werner's Contribution

Based on the analysis of the options and the specific details provided in the question – being the first Swiss chemist, winning the Nobel Prize in 1913, and his work on the linkage of atoms and coordination theory – Alfred Werner fits all the criteria perfectly. His coordination theory proposed that metal atoms can form coordinate bonds with a fixed number of ligands (molecules or ions) and helped explain the structures and properties of complex inorganic compounds.

Summary Table: Chemists and Their Work

Additional Information on Alfred Werner and Coordination Theory

Alfred Werner (1866–1919) is considered one of the founders of modern coordination chemistry. Before his theory, the structure of many inorganic compounds, especially those involving metals and other groups (like ammonia or chloride ions), was puzzling. Werner proposed:

• That metals have two types of valency or combining capacity: primary (ionic) and secondary (coordinate).
• That the secondary valency is directed towards fixed positions in space around the central metal atom, leading to specific geometric structures (like octahedral, square planar, tetrahedral) for coordination compounds. This was a bold idea at the time, introducing stereochemistry to inorganic chemistry.
• He performed experiments, such as measuring electrical conductivity and preparing numerous isomers of coordination compounds, to support his structural predictions. For example, he correctly predicted and verified the existence of isomers for compounds like $$[Co(NH_{3})_{4}Cl_{2}]Cl$.

His work provided a systematic way to understand the bonding and structure of a vast class of inorganic compounds, solidifying his place as the winner of the 1913 Nobel Prize in Chemistry.