predict the geometries of the complexes from these reactions:
1- [pt(NO2)cl3)]2- + NH3 --> [pt(NO2)(NH3)cl2]-1 +cl-
2-cis-[pt(RNH2)2(NH3)(NO2)]+1 + cl- --> Pt(RNH2)(NH3)(NO2)Cl + RNH2
To predict the geometries of the complexes in these reactions, we need to examine the electron geometry and the ligands attached to the central metal ion. The electron geometry refers to the arrangement of electron pairs around the central metal ion, while the ligands are the molecules or ions attached to the metal ion.
1. [Pt(NO2)Cl3)]2- + NH3 → [Pt(NO2)(NH3)Cl2]-1 + Cl-
In the reactant complex [Pt(NO2)Cl3)]2-, we have a platinum (Pt) ion surrounded by three chloride (Cl-) ions and one nitrite (NO2-) ion. The electron geometry is octahedral (six electron pairs).
When NH3 (ammonia) coordinates with the Pt ion, it replaces one of the chloride ions, resulting in the product complex [Pt(NO2)(NH3)Cl2]-1. In this complex, the Pt ion is still surrounded by six electron pairs, giving an octahedral electron geometry. However, the ligands attached to Pt are now two chloride ions (Cl-), one nitrite ion (NO2-), and one ammonia molecule (NH3).
2. cis-[Pt(RNH2)2(NH3)(NO2)]+1 + Cl- → Pt(RNH2)(NH3)(NO2)Cl + RNH2
In the reactant complex cis-[Pt(RNH2)2(NH3)(NO2)]+1, we have a platinum (Pt) ion surrounded by two primary amine ligands (RNH2), one ammonia (NH3) molecule, and one nitrite (NO2-) ion. The electron geometry is again octahedral (six electron pairs).
When Cl- coordinates with the Pt ion, it replaces one of the primary amine ligands, resulting in the product complex Pt(RNH2)(NH3)(NO2)Cl. In this complex, the Pt ion is still surrounded by six electron pairs, giving an octahedral electron geometry. The ligands attached to Pt are now one chloride ion (Cl-), one primary amine (RNH2), one ammonia (NH3) molecule, and one nitrite ion (NO2-).
By analyzing the molecular structures and the ligands present, we can determine the geometries of the complexes in each reaction.