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Coordination Compounds

Question
CBSEENCH12011472
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Consider the following species:
CN+, CN–, NO and CN

Which one of these will have the highest bond order?

  • NO

  • CN-

  • CN

  • CN+

Solution

B.

CN-

Tips: -

NO: (σ1s)2, (σ*1s)2,(σ2s)2(σ*2s2),(σ2pz)2(π2px)2 = (π2py)2 , (π*2px)1 =(π*2py)0 B.O = 10-52 = 2.5CN-:   (σ1s)2, (σ*1s)2,(σ2s)2(σ*2s2),(π2px)2 = (π2py)2 (σ2pz)2B.O = 10-42 = 3CN =  (σ1s)2, (σ*1s)2,(σ2s)2(σ*2s2),(π2px)2 = (π2py)2 (σ2pz)1B.O.  =9-42 = 2.5CN+ =  (σ1s)2, (σ*1s)2,(σ2s)2(σ*2s2),(π2px)2 = (π2py)2B.O. = 8-42 = 2

Some More Questions From Coordination Compounds Chapter

Write the formula for the following coordination compound:
Tris(ethane -1, 2-diamine) chromium(III) chloride

Write the formula for the following coordination compound:
Amminebromidochloridonitrito-N-platinate (II)

Write the formula for the following coordination compound:
Dichloridobis(ethane-1, 2-diamine)platinum(lV) nitrate.

Write the formula for the following coordination compound:
Iron(III) hexacyanidoferrate(II)

Write the IUPAC names of the following coordination compounds:
(i) [Co(NH3)6]Cl3
(ii) [Co(NH3)5Cl]Cl2
(iii) K3[Fe(CN)6]
(iv) K3[Fe(C2O4)3]
(v) K2[PdCl4]
(vi) [Pt(NH3)2Cl(NH2CH3)]Cl.

Indicate the type of isomerism exhibited by the following complexes and draw structures for these isomers:
(i)    K[Cr(H2O)2(C2O4)2],                      (ii) [Co(en)3Cl3,
(iii) [Co(NH3)5(NO2)]|NO3]2,                 (iv) [Pt(NH3)(H2O)Cl2]

Explain on the basis of valence bond theory that [Ni(CN)4]2–  ion with square planar is diamagnetic and the [NiCl4]2– ion with tetrahedral geometry is paramagnetic.

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