Shweta thakur Asked a Question
July 22, 2020 9:02 ampts 30 pts
compounds. 1he alkyS UI Complexation Behaviour of Alkali Metals netaliIC and and organic The alkali metals generally have weak complexing ability. This is he alayafion viz, small size, hign nucear charge and availability of empty orhit se the factor that iavour lacking in alkali metals. nergy are oves like [Li(H,O) Cs{H,0) are known. A number of chelates are knouirn those with salicylaldehyde and acetyl acetone. innortant development in the field of alkali metal chemistry is the discovery of complexes with cyclic ethers and cryptands (cryptates) 1.e. With macro cyclic molecules containina nit The cyclic ethers are called crown ethers; they have varying sizes of rings and form complexes with alkali metal ions by donating electron deng agents than the crown ethers, with eight donor atoms (nitrogen and oxygen) surrounding the metal ion completely. The ability of crown ether r a cryptands to trap a metal ion depends on the size of both the cavity and the metal ion.
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  • Priyanshu kumar Best Answer
    Due to the chelate effect, crown ethers and cryptands have greater affinity for alkali metal ions.. The cation selectivity for alkali metal ions is mainly dependent on the size and...
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    Priyanshu kumar
    crown ethers are generally polyethers separated by two methylene group...here cental metal generally is alkali metal and alkaline earth metal to which ethereal oxygen is coordinate...
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  • Suman Kumar thankyou
    See alkali metal are known for their eletropositivity. They don't form complexes as they have low charge density , can't form covalent bond except lithium. But Cryptand & crown eth...
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    Suman Kumar
    Explanation is better in Jd lee.
  • Dinesh khalmaniya
    check it
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    Dinesh khalmaniya
    please accept the answer if you got it 🙏
  • Priyanshu kumar
    https://youtu.be/D8mMlpC2FFI check this video for more clear understanding
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    Priyanshu kumar
    check this video too shweta