Naphthalene dithiol and derivative thereof, and preparation method and application thereof

The present invention provides a naphthalene dithiol or a derivative thereof having both a high refractive index and high solubility (intermiscibility), and a manufacturing method and a use thereof. The naphthalene compound of the present invention is represented by formula (1). # imgabs0 # (In the formula, R1 and R2 each independently represent a hydrogen atom or a substituent, R3 represents a substituent, and n represents an integer of 0 to 6. ) At least one of R1 and R2 may be the substituent. The naphthalene compound represented by formula (1) can be dissolved or mixed in an organic solvent to form a mixture (or a solvate); a curable composition containing the naphthalene compound represented by formula (1), or a curable composition containing the naphthalene compound represented by formula (1); this resin contains at least a constituent unit represented by formula (1P). # imgabs1 # (In the formula, R3 represents a substituent, and n represents an integer of 0 to 6). 本发明提供一种可兼具高折射率与高溶解性(相溶性)的萘二硫醇或其衍生物，以及其