Disulfur dioxide, dimeric sulfur monoxide or SO dimer is an oxide of sulfur. The molecule is unstable with a lifetime of a few seconds. It is an asymmetric top molecule. The molecule adopts cis-planar structure with C2v symmetry with the two sulfur atoms joined. The shape is the same as the tetrasulfur molecule S4. The S-O bond length is 145.8pm, shorter than in the sulfur monoxide monomer, and the S-S bond length is 202.45pm. The OSS angle is 112.7°. S2O2 has a dipole moment of 3.17D.

CAS：126885-21-0
中文别名：
英文别名：Dischwefeldioxyd;
分子式：H2O2S2
分子量：98.1447
精确质量：97.9496
Psa：111.74
Logp：0.5234