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指出下列配合物或配离子存在的异构现象： (1) [CoBrCl(NH 3 ) 2 (en)] + (顺式)； (2) [Co(NO 2 )(NH 3 ) 5 ] 2+ ； (3) [PtCl 2 (NH 3 ) 2 ]； (4) [Cu(NH 3 ) 4 ][PtCl 4 ]； (5) [PtCI(NH 3 ) 5 ]Br。 几何异构______，旋光异构______，解离异构______，键合______，配位异构______。
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