Question

As per IUPAC nomenclature, the name of the complex $[Co (H_2O )_4(NH_3 )_2]Cl_3$ is

• A. tetraaquadiaminecobalt (III) chloride
• B. tetraaquadiamminecobalt (III) chloride
• C. diaminetetraaquacobalt (II) chloride
• D. diamminetetraaquacobalt (III) chloride

Answer 1

Answer: (D)

diamminetetraaquacobalt (III) chloride

Answer 2

The IUPAC name of the given complex is diaminetetraaquacobalt $(III)$ chloride. [ $\therefore$ Alphabetic order of legands $=$ ammine $>$ aqua and oxidation state of C?? $x+2 \times 0+4 \times 0+(-1) 3 =0$ $x-3 =0$ $X =+3$]