Sulfur trioxide monomeric

Sulfur Trioxide. Pure sulfur trioxide [7446-11-9] at room temperature and atmospheric pressure is a colorless Hquid that fumes in air. This material can exist in both monomeric and polymeric forms. In the gaseous and Hquid state pure SO is an equiHbrium mixture of monomeric SO and... 

Figure 15.27 Structure of the monomeric, trimeric and chain-polymeric forms of sulfur trioxide.

Sulfur trioxide, SO3 (with boiling point 44.5° C) is monomeric in the vapor state, but several modifications of solid SO are recognized. There are at least two distinct polymeric forms, and a third solid form which has been found to contain six-membered rings ... 

Various sulfur imides based on sulfur trioxide are possible. Thus one, two, or three oxygen atoms in the monomeric trioxide could be replaced by the isosteric NH group, and numerous imides can be formulated which... 

---