Organocadmium compound | organometallic reagents | part 1 | M.Sc

Summary

This video lecture explores organo-cadmium compounds, providing a detailed introduction to their properties, preparation methods, chemical reactions, and applications. It covers key points such as the bonding between carbon and cadmium, their sensitivity to air, light, and moisture, and their comparison with organo-zinc compounds. The lecture delves into preparation techniques using organic halides and Grignard or organo-lithium reagents, with examples provided. The video also highlights the toxicity of cadmium compounds and their environmental risks. By the end, viewers will gain a comprehensive understanding of organo-cadmium compounds and their uses in chemistry.

Takeaways

• 😀 Organocadmium compounds are organometallic compounds where a chemical bond is formed between carbon and cadmium.
• 😀 Cadmium belongs to Group 12 in the periodic table, sharing it with zinc and mercury.
• 😀 Organocadmium compounds are sensitive to air, light, and moisture.
• 😀 Compared to organozinc compounds, organocadmium compounds are less nucleophilic and less reactive.
• 😀 Di-alkyl cadmium compounds are less volatile than their corresponding organozinc compounds.
• 😀 Di-alkyl cadmium compounds are weaker electron acceptors and do not readily form complexes.
• 😀 The simplest organocadmium compound is dimethyl cadmium (CH3)2Cd.
• 😀 Cadmium compounds are toxic, posing environmental risks and limited applications due to their harmful effects.
• 😀 Inhalation of dimethyl cadmium can damage the kidneys, liver, and central nervous system, and harm respiratory organs.
• 😀 Organocadmium compounds can be synthesized using methods like reacting cadmium salts with highly reactive metal cadmium or reacting with organic halides.

Q & A

What are organo-cadmium compounds?

Organo-cadmium compounds are organometallic compounds in which there is a chemical bond between carbon and cadmium atoms.

What group does cadmium belong to in the periodic table?

Cadmium belongs to Group 12 of the periodic table, along with zinc and mercury.

What are the key properties of organo-cadmium compounds?

Organo-cadmium compounds are sensitive to air, light, and moisture. They are less nucleophilic and less reactive compared to organo-zinc compounds, and they are less volatile.

How do organo-cadmium compounds compare to organo-zinc compounds?

Organo-cadmium compounds are less reactive, less nucleophilic, and less volatile than organo-zinc compounds.

What is the simplest organo-cadmium compound?

The simplest organo-cadmium compound is dimethyl cadmium (CH3)2Cd.

What makes cadmium compounds toxic?

Cadmium compounds are toxic and can cause damage to kidneys, liver, and the central nervous system. They are harmful to the environment as well.

What is a significant health risk associated with inhaling dimethyl cadmium?

Inhaling dimethyl cadmium can damage respiratory organs, in addition to harming kidneys, liver, and the central nervous system.

What is the first method for preparing organo-cadmium compounds?

The first method involves the reduction of cadmium salts to generate highly reactive cadmium metal, which then reacts with alkyl, benzyl, or aryl halides to form dialkyl cadmium compounds.

How is cadmium metal generated for the preparation of organo-cadmium compounds?

Cadmium metal is generated by reducing cadmium salts, which are less reactive towards organic halides.

What are the reactions involved in preparing organo-cadmium compounds with Grignard reagents?

When cadmium halides react with Grignard reagents, they form dialkyl cadmium compounds. This reaction can also occur with organo-lithium compounds, producing similar products.