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. 2021 May 17;60(11):8315–8321. doi: 10.1021/acs.inorgchem.1c00986

Table 2. Spectroscopic and Electrochemical Properties of {Re[TpXPC]}2, {Ru[TpXPC]}2, and {Os[TpXPC]}2: Soret and Q Band λmax (nm) and E1/2 Values (V vs SCE).

  λmax (nm)
               
complex Soret Q E1/2ox4 E1/2ox3 E1/2ox2 E1/2ox1 E1/2red1 E1/2red2 ΔE refa
{Re[TPC]}2 405 599   1.18 0.84 0.57 –0.54 b 1.11 tw
{Re[TpMePC]}2 407 601   1.12 0.78 0.51 –0.55 b 1.06 tw
{Re[TpOMePC]}2 408 602   1.09 0.74 0.49 –0.57 b 1.06 tw
{Ru[TpCF3PC]}2 328, 397 541   1.31 1.09 0.76 –0.63 –1.43 1.39 (16)
{Ru[TPC]}2 328, 397 539 1.56 1.23 0.99 0.55 –0.86 –1.66 1.41 (16)
{Ru[TpMePC]}2 329, 398 538 1.44 1.18 0.98 0.52 –0.85   1.37 (16)
{Ru[TpOMePC]}2 329, 406 533 1.33 1.14 0.92 0.50 –0.86   1.36 (16)
{Os[TpCF3PC]}2 287, 407 583   1.28 1.01 0.79 –1.13 –1.54 1.92 (17)
{Os[TPC]}2 287, 405 584   1.15 0.93 0.60 –1.29 –1.69 1.89 (17)
{Os[TpMePC]}2 287, 407 584 1.35 1.09 0.88 0.55 –1.31 –1.72 1.86 (17)
{Os[TpOMePC]}2 286, 407 585 1.28 1.05 0.85 0.54 –1.32 –1.73 1.86 (17)
a

tw = this work.

b

A second reduction is partially discernible below −1.80 V, but it is not fully reversible at room temperature.