Stacks of platinum clusters display trigonal geometry in clusters of this molecule named for Paolo Chini. The UV-vis spectra of reduced cytochrome P450 enzymes bound to this molecule typically display a 450-nanometer Soret peak. The vibrational frequency of a complex containing this molecule measures a ligand’s Tolman electronic parameter. Coordination of iodine and this molecule to iridium forms a complex used to catalyze the synthesis of (*) acetic acid. This molecule, which is iso·electronic to cyanide, is listed furthest to the strong-field side on the spectrochemical series. Compared to (10[1])another molecule, this heteroatomic molecule displays a 200-fold higher affinity to hemoglobin. (10[1])For 10 points, name this poisonous, odorless gas (10[1])formed during incomplete combustion. ■END■