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1H and 13C-NMR spectra indicate that naphthalene portion of 1,4-bis-(chloromethyl)- naphthalene was slightly twisted due to C8 – H---Cl* bonding. The electrons distribution on magnetically equivalent carbons became uneven that is why ten carbon peaks instead of five pairs of magnetically equivalent carbons had appeared in 13C-NMR spectra. Due to C8 – H --- Cl* bonding, extension and contraction in bond lengths from their normal positions had occurred. Similar case was with 1H-NMR of the said compound. The molecule also showed antifungal and antibacterial properties. [ABSTRACT FROM AUTHOR]

In the title compound, C(13)H(13)NO(6)S, the thia-zine ring adopts a distorted half-chair conformation. Each mol-ecule is linked to its neighbour through inter-molecular C-H⋯O hydrogen bonds.