Patent ID: 8575249

Claim:
A polygermane compound comprising a sulfur atom-containing organic group as a group bonded to a germanium atom, wherein the sulfur atom-containing organic group is a group of Formula [1]: -L-Z [1] where L is a single bond, a C 1-6 alkylene group, or a C 4-20 arylene group optionally substituted with a C 1-6 alkyl group; and Z is a C 1-20 sulfide group, a C 1-14 cyclic sulfide group optionally substituted with a C 1-6 alkyl group, a C 2-20 alkyl group containing a sulfide bond, or a C 5-20 aralkyl group containing a sulfide bond, with a proviso that when L is a single bond, Z is not a C 1-20 sulfide group.