Explain the following terms:
(a) coordination number
(b) counter ions.
a) coordination number : The coordination number of a metal ion in a complex can be defined as the number of ligand donor atoms to which the metal is directly bonded. For example, in the complex ions, [PtCl6]-2 and [Ni(NH3)4]2+, the coordination number of Pt and NI are 6 and 4 respectively.
b) Counter ion: The species with in the square bracket are coordination entities or complexes and the ions outside the square bracket are called counter ions.
Write the hybridization and magnetic behaviour of the complex [Ni(CO)4].
(At.no. of Ni = 28)
A coordination compound has the formula CoCl3.4NH3. It does not liberate ammonia but forms a precipitate with AgNO3. Write the structure and IUPAC name of the complex compound.
Write down the IUPAC name of the following complex:
[Cr(NH3)2Cl2(en)]Cl (en = ethylenediamine)
Write the correct formulae for the following coordination compounds:
(a) CrCl3.6H2O (violet, with 3 chloride ions/unit formula)
(b) CrCl3.6H2O (light green, with 2 chloride ion/unit formula)
(c) CrCl3.5H2O (dark green, with 1 chloride ion/unit formula)
On the basis of crystal field theory, write the electronic configuration for d4 ion if ∆o < P ?
Which of the following is a more stable complex and why?
(i) [Co(NH3)6]3+
(ii) [Co(en)3]3+
Draw the structure of the following compounds:
(a) cis-[CrCl2(OX)2]3– (b) [Ni(CN)4]2–
(c) [Fe(CN)6]3– (d) Meridional [CrCl3(NH3)3]+
(e) trans-[PtCl2(en)2]2+.