Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having the structure of Formula VIII. ##STR00001##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having the structure of Formula VIII. ##STR00001##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

##STR00001## ##STR00002##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

##STR00001## ##STR00002##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

##STR00001## ##STR00002## ##STR00003##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

##STR00001## ##STR00002## ##STR00003##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures: ##STR00001##

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures: ##STR00001##

Disclosed are a deuterated oxophenylarsine, or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition containing a pharmaceutically acceptable carrier and the deuterated oxophenylarsine. The deuterated oxophenylarsine can be used for treating and preventing cancers and related diseases.

To provide a material suitable for a nonaqueous electrolyte battery having high-temperature durability. An ionic complex of the present invention is represented by any of the following formulae (1) to (3). For example, in the formula (1), A is a metal ion, a proton, or an onium ion; M is any of groups 13 to 15 elements. R.sup.1 represents a C.sub.1 to C.sub.10 hydrocarbon group which may have a ring, a heteroatom, or a halogen atom, or N(R.sup.2). R.sup.2 at this time represents hydrogen atom, alkali metal atom, a C.sub.1 to C.sub.10 hydrocarbon group which may have a ring, a heteroatom, or a halogen atom. R.sup.2 can also have a branched chain or a ring structure when the number of carbon atoms is 3 or more. Y is carbon atom or sulfur atom. a, o, n, p, q, and r are each predetermined integers. ##STR00001##