Explain sigma and pi bonded organometallic compounds with ex?

Dear student,

Organometallic compounds have at least one carbon to metal bond, according to most definitions. This bond can be either a direct carbon to metal bond ( σ bond or sigma bond) or a metal complex bond ( π bond or pi bond). Compounds containing metal to hydrogen bonds as well as some compounds containing nonmetallic ( metalloid ) elements bonded to carbon are sometimes included in this class of compounds. Some common properties of organometallic compounds are relatively low melting points, insolubility in water, solubility in ether and related solvents, toxicity, oxidizability, and high reactivity.

An example of an organometallic compound of importance years ago is tetraethyllead (Et ₄ 4Pb) which is an antiknock agent for gasoline. It is presently banned from use in the United States.

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