The anomalous high reactivity of Ca+ with S8 in the gas phase: [CaS3]+ and [CaS11]+
Abstract
The ion Ca+(g) reacts more rapidly than any other M+(g) with S8(g), first forming [CaS3]+, which undergoes reversible addition of S8 to [CaS11]+, with slower formation of a second more stable isomer of [CaS11]+ believed from density functional calculations to have the structure (η2-S3)Ca(η4-1,3,5,7-cyclo-S8).