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... > chemical entity > molecular entity > polyatomic entity > heteroatomic molecular entity > coordination entity > transition element coordination entity > ruthenium coordination entity > hexaammineruthenium(2+)

... > chemical entity > molecular entity > transition element molecular entity > iron group molecular entity > ruthenium molecular entity > ruthenium coordination entity > hexaammineruthenium(2+)

... > chemical entity > molecular entity > transition element molecular entity > d-block molecular entity > iron group molecular entity > ruthenium molecular entity > ruthenium coordination entity > hexaammineruthenium(2+)