Why is the complex `[CoF_6]^(3-)` less stable than the complex `[Co(en)_3]^(3+)` ?

The complex [CoF_6]^(4-) is :

Why is the complex [Co(en)_(3)]^(3+) more stable than the complex [CoF_(6)]^(3-) ?

Why chelated complexes are more stable than unchelated complexes

What type of isomerism is shown by the complex [Co(en)_3]^(3+) ?

What type of isomerism is exhibited by the complex [Co(en)_3]^(3+) ?

The octahedral complex [Co(NH_3)_6]^(3+) is diamagnetic while the octahedral complex [CoF_6]^(3-) is paramagnetic. Explain using VB theory.

Which of the following complexes is more stable and why ? [Co(en)_3]^(3+) and [Co(NH_3)_6]^(3+)

Which of the following complexes is more stable and why ? [Co(en)_3]^(3+) and [Co(NH_3)_6]^(3+)

What type of isomerism is exhibited by the complex [Co("en")_(3)]^(3+) ?