(a) The values of max for the most intense absorptions in the electronic spectra of [CoCl...
Question:
(a) The values of εmax for the most intense absorptions in the electronic spectra of [CoCl4]2− and [Co(OH2)6]2+ differ by a factor of about 100. Comment on this observation and state which complex you expect to exhibit the larger value of εmax.
(b) In the electronic absorption spectrum of a solution containing [V(OH2)6]3+, two bands are observed at 17200 and 25600 cm−1. No absorption for the
transition is observed. Suggest a reason for this, and assign the two observed absorptions.
(c) Red crystalline [NiCl2(PPh2CH2Ph)2] is diamagnetic. On heating to 387K for 2 hours, a blue-green form of the complex is obtained, which has a magnetic moment of 3.18 μB at 295 K. Suggest an explanation for these observations and draw structures for the complexes, commenting on possible isomerism.
Step by Step Answer:
a The observation that the values of max molar absorptivity for the most intense absorptions in the electronic spectra of CoCl42 and CoOH262 differ by a factor of about 100 can be attributed to the li...View the full answer
