Silicon, [2,9,16,23-tetrakis(1,1-dimethylethyl)–29H,31H–phthalocyaninato(2-)–κN²⁹,κN³⁰,κN³¹,κN³²]bis(1,1,1-trihexylsilanolato)–, (OC–6-12)– (ACI)