Fullerene as Ligand MCQ

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• How can organo-palladium polymers be formed?
  ক

  From Pd2(db]2.CHCl 3.CHCl d) From Pd2(db]3.CHCl3 View Answer]

  খ

  From Pd2.CHCl3

  গ

  From Pd(dba)3.CHCl

  ঘ

  From Pd2(dba)3.CHCl3
• What is the ratio of the (Ph3P)2Pt(η2-C2H4) and C60 used for the formation of the dark emerald green solution?
  ক

  2:1

  খ

  1:3

  গ

  1:1

  ঘ

  3:2
• Which of the following is a Vaska complex? 6C60 d) Pd2(db
  ক

  Ir(CO)Cl(PPh3)2 3.CHCl3 View Answer]

  খ

  (Ph3P)2Pt(η2-C60)

  গ

  [(Et3P)2Pt

  ঘ

  (Et3P)2Pt
• Why do fullerenes behave as ligands? double bond d) Electron rich
  ক

  Globular structure

  খ

  Behave as alkanes

  গ

  [6,6

  ঘ

  6,6
• Olefins coordinated to transition metals lose their planarity.
  ক

  True

  খ

  False
• How can the ratio of Pd:C60 be changed in organo-palladium polymers of C60?
  ক

  By centrifuging the suspension

  খ

  By heating the suspension

  গ

  By cooling the suspension

  ঘ

  By desiccating the suspension
• Choose the incorrect statement regarding (Et3P)2MC60 (M=Ni, Pt, Pd).
  ক

  Harder to reduce than organic monoadducts of type C60RR’

  খ

  Lower selectivity for formation of monoadducts
• Why is binding of C60 to a transition metal in a hexahepato fashion unfavorable?
  ক

  Orbital overlap is weakened

  খ

  Geometry of p-orbitals remain perpendicular to the centre of the ring

  গ

  Orbital overlap is strengthened

  ঘ

  Geometry of p-orbitals remain parallel to the centre of the ring
• Which of the following effect is not observed when C60 forms metal complex?
  ক

  Removal of a double bond from 29 fullerene bonds

  খ

  A polyene system shows decrease in electron affinity of the system

  গ

  Reduction in electron affinity upon transfer of e- density from metal to π* orbitals of double bonds

  ঘ

  Increased conjugation shown by a polyene system