Reaction of Ir complex A with Con gave a black solid residue B with the following spectral characteristics: mess spectrum: M - 1056; H NMR: 8 7.65

Reaction of Ir complex A with Con gave a black solid residue B with the following spectralcharacteristics: mess spectrum: M - 1056; H NMR: 8 7.65 ppm (multiplet, 210). 7.48(multiplet, 2H), 6.89 (triplet, 1H), and 5.97 (doublet, 2H1); IR: v (CO) = 1998 em60A. Propose a structure for B.b. The carbonyl stretch of A was reported at 1954 cm . How does the electron densityat Ir change in going from A to B?c. When B was treated with PPhy, a new complex C formed rapidly, along with someCan. What is a likely structure of C7