Sulfur trioxide
Sulphur trioxide
Real, long lived, electronically neutral reagent chemical.

Gram formula weight (molecular mass) = 80.063
Melting point = 17 °C
Boiling point = 45 °C
Density = 1.4 g/cm3
Purity = 99 %
Solubility in organics = slightly soluble

Pure sulfur trioxide is prone to polymerise. The material is stabilised by thionyl chloride or oxalyl chloride.
Wikipedia Page:

Sulfur trioxide
is defined with respect to the entities below:
The entities below are defined with respect to:
Sulfur trioxide
Electrophile (AS/A2 generic)

Electrophile (generic)

Hard Lewis acid (generic)

Lewis acid (AS/A2 generic)

Molecular material (generic)

Mono-bond type material (generic)

Nucleophilic attack susceptible species (generic)

Oxidised main group element oxidising agent (generic)

Period 3 Oxides (AS/A2 generic)

VSEPR geometry = AX3 (generic)

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