Coordination Chemistry

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Multiple Choice

Which of the following complexes are diamagnetic?
(1) [Co(NH3)6]3+
(2) [W(CO)6]
(3) [Cr(NH3)6]3+
(4) [Fe(CN)6]3-

  1. 1 and 2 only
  2. 1 and 3 only
  3. 2 and 3 only
  4. 2 and 4 only
  5. 2, 3, and 4 only
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