Assuming a Coordination Complex Is Formed with Fe²⁺ and 1,10-Phenanthroline

Multiple Choice

Assuming a coordination complex is formed with Fe²⁺ and 1,10-phenanthroline (shown below) , which of the following statements is true?

A) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 2.
B) If two 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6.
C) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 3.
D) If three 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 6.
E) If four 1,10-phenanthroline molecules are coordinated to the iron ion, then the coordination number is 4.