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Question from: Chemistry

The IUPAC nomenclature of the compound LiAlH4 is

A)  

lithiumtetrahydridoaluminate (III)

B)  

aluminium tetrahydrido lithium

C)  

tetrahydrido lithium aluminate (III)

D)  

lithium aluminium hydride

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juanbacan

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Correct answer: lithium tetrahydridoaluminate (III).

Explanation: LiAlH4 is an ionic compound composed of Li+ and the complex anion [AlH4]−. In IUPAC naming, the anion is named first as tetrahydridoaluminate(III) (Al is +3 with four hydrido ligands), followed by the cation lithium → lithium tetrahydridoaluminate(III).

  • lithium aluminium hydride — common/trivial name, not systematic IUPAC.
  • aluminium tetrahydrido lithium / tetrahydrido lithium aluminate(III) — incorrect ordering/format per IUPAC rules.

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