You are an expert in photocatalysis. For the following 3D structure, what is its reduction potential for Fe(III)/Fe(II) conversion measured against SCE? Please answer in a single float number.
87

Fe        18.89430        3.53540       11.96900
N         16.71930        2.98200       13.76940
N         17.86780        4.13310        9.34850
N         20.41810        5.85910       12.70450
N         16.46190        5.05760       13.26260
N         20.59170        4.52660       14.39760
N         20.54170        1.18380       12.05760
C         17.19430        0.62010       14.49340
H         16.40510        0.55110       15.01660
C         17.47680        1.76670       13.79510
C         18.10890       -0.45770       14.41160
C         19.54060        7.48830        9.43730
C         17.81870       -1.71930       15.22900
C         16.51060       -2.07780       15.53030
H         15.79070       -1.52340       15.25250
C         16.25550       -3.24810       16.23320
H         15.36060       -3.49370       16.43920
C         17.30780       -4.05980       16.63960
H         17.13400       -4.85980       17.12090
C         18.61750       -3.70130       16.33830
H         19.33750       -4.25550       16.61590
C         18.87290       -2.52990       15.63540
H         19.76760       -2.28510       15.42920
C         18.58940        5.31910        9.68480
C         18.76250        6.43980        8.90010
H         18.37600        6.50350        8.03420
C         19.92200        6.19620       11.41770
C         20.13790        7.35640       10.71000
H         20.67420        8.05220       11.06980
C         19.15870        5.15680       10.94360
C         17.25800        3.98650       13.00100
N         21.59220        2.47800       10.71700
N         17.28600        2.09470        9.67780
C         17.91600        3.11170       10.29670
C         15.62570        3.42390       14.50500
H         15.10370        2.91760       15.11560
C         18.56880        1.91430       12.98240
C         19.24550       -0.35630       13.60360
H         19.85970       -1.07760       13.52980
C         20.01970        4.60320       13.18090
C         19.45140        0.82980       12.91460
C         20.44070        2.40480       11.46900
C         21.32470        5.67650       14.68720
H         21.79930        5.85180       15.49120
C         19.85860        8.72390        8.59650
C         21.06290        9.40030        8.75530
H         21.69360        9.10160        9.40050
C         21.34400       10.51200        7.97060
H         22.16730       10.97390        8.07920
C         20.42040       10.94830        7.02720
H         20.61330       11.70880        6.49160
C         19.21780       10.27300        6.87070
H         18.58580       10.57150        6.22510
C         18.93500        9.16130        7.65540
H         18.11210        8.69920        7.54640
C         15.46310        4.70470       14.17570
H         14.78320        5.28090       14.50350
C         21.23820        6.49500       13.61990
H         21.65570        7.34160       13.51540
C         17.22560        3.73850        8.21120
H         17.07090        4.25730        7.43000
C         21.68890        0.47240       11.69790
H         21.95090       -0.39570       11.98120
C         20.40550        3.42170       15.34810
H         21.24440        3.28480       15.85250
C         15.59170        7.31460       12.76520
H         15.85320        8.17840       12.38250
H         14.72110        7.04750       12.40720
C         16.85710        2.47690        8.42140
H         16.37900        1.92930        7.80880
C         21.89490        3.56600        9.77590
H         22.87490        3.68330        9.71180
C         19.29870        3.66520       16.30560
H         18.46520        3.81630       15.81110
H         19.19450        2.88630       16.89010
C         22.33170        1.30440       10.85480
H         23.15950        1.12010       10.42380
C         21.33470        3.26160        8.41670
H         21.57810        3.97970        7.79630
H         21.70510        2.41260        8.09490
C         16.60600        6.29320       12.41490
H         17.51100        6.67360       12.53990
C         17.30630        0.70690       10.20790
H         17.95570        0.62400       10.95080
C         15.90210        0.46220       10.69140
H         15.29450        0.42810        9.92410
H         15.86890       -0.39360       11.17140


Answer: -0.57