“…Furthermore, the S–O bond of 1.551(9) Å is in between the 1.634(1) Å and 1.476(1) Å observed in t Bu 2 P(=O)–S(=O)–O–B(N i Pr 2 ) 2 , 94 and nearly identical to that observed in sulfinates formed by SO 2 insertion into Zn–C bonds. 95,96 From these metric parameters, we conclude that the two chelates to each uranium are both fully delocalized, like the coordination of an oxalate dianion. 97…”