Two　nickel　coordination　compounds　with　m-aminophenol-N,N,O-triacetic　acid　(H3L),　[Ni(L)center　dot(H2O)(3)](2)center　dot　Ni(H2O)(6)center　dot　4.3H(2)O　(1),　and　[Ni(L)center　dot　H2O](2)center　dot　Ni(H2O)(6)　(2),　were　obtained　under　similar　reaction　conditions　but　at　different　synthesis　temperature.　Single　crystal　X-ray　diffraction　analysis　reveals　that　both　coordination　compounds　exhibit　discrete　dimeric　entity　structures　and　contain　hexaaquanickel　cations　acting　as　counter-ions.　Unit　cell　data　for　(1):　triclinic,　space　group　P-1,　a　=　7.9977(16),　b　=　10.475(2),　c　=　12.952(3)　and　alpha　=　107.36(3),　beta　=　99.66(3),　gamma　=　96.15(3)A　degrees;　and　for　(2):　monoclinic,　space　group　P2(1)/c,　a　=　13.524(3),　b　=　8.5703(17),　c　=　13.820(3)　and　beta　=　95.25(3)A　degrees.　In　(1),　O-Ha　＜-O　hydrogen　bonds　link　the　complex　anions　into　a　dimeric　unit.　But　in　(2),　the　dimeric　unit　is　generated　from　two　Ni　centers　bridged　by　two　ligands.　Extensive　hydrogen　bond　interactions　exist　in　both　coordination　compounds,　and　connect　the　complex　anions,　hexaaquanickel　cations　and/or　water　molecules,　resulting　in　three-dimensional　supramolecular　structures.　The　compounds　also　have　been　characterized　by　elemental　analysis,　powder　X-ray　diffraction　(PXRD),　thermogravimetric　analysis　(TGA),　FT-IR　and　UV-Vis　spectra.