(1e) has been disclosed to promote the catalytic propargylic substitution reaction of propargylicalcohols bearing not only terminal alkyne group but also internal alkyne group with thiols. It is noteworthy that neutral thiolate-bridged diruthenium complexes (1a-1c), which were known to promote the propargylic substitution reactions of propargylicalcohols bearing a terminal alkyne group with various heteroatom-