Why is [Cr(NH3)6]3+ ion not diamagnetic? from Chemistry
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    Coordination Compounds

    Multiple Choice QuestionsShort Answer Type

    261.

    Write IUPAC name of  of [Co(NO2)(NH3)5]Cl2.

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    262.

    What is the coordination number of cobalt in [Co(en)2H2OBr]Cl?

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    263.

    Write the formula of coordination compound: Pentammine chloro cobalt(III) chloride.

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    Answer
    264.

    What is the oxidation state of platinum in  [Pt(en)2Cl2]?

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    265.

    Why is [Cr(NH3)6]3+ ion not diamagnetic?

    Electronic configuration of Cr is 4s1 3d5 . the oxidation number of Cr is in [Cr(NH3)6]3+ is Cr3+. therefore,

     

    Six pairs of electrons, one from each NH3 molecule, occupy the six hybrid orbitals. Thus, the complex has octahedral geometry. due to unpaired electrons the complex is paramagnetic.

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    266.

    What is the type of hybridization associated with Cu2+ ion in [Cu(NH3)4]2+ complex?

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    267.

    In a geometry of [PtCl4]2– is square planar, what orbitals of platinum are involved in the bonding?

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    268.

    What is the oxidation state of metal in metal carbonlys?

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    269.

    Identify the ligands in complex ion [Co(en)2Cl(ONO)]+ and write its IUPAC name.

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    270.

    Give an example of hexadentate ligand. 

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