title: Spectral evidence and DFT calculations on the formation of Bis(2,2'-bipyridine)platinum(II)-N-base adducts.
abstract: The formation of 1:1 adducts of Pt(bpy)2(2+) (bpy = 2,2'-bipyridine) with various N bases (B) has been ascertained in water at ambient temperature by spectrophotometric titration and electrospray ionization mass spectroscopy. A pseudo-five-coordinated complex, [Pt(bpy)2(B)](2+) with a monodentating bpy, is proposed based on density functional theory calculation. The formation constants (Kc) increase with the nucleophilicity of B except for sterically hindered N-bases, indicating an associative ligand-substitution mechanism.
authors.affiliation: Nanotechnology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1-5 Higashi, Tsukuba, Ibaraki, Japan. yuji-kawanishi@aist.go.jp
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kawanishi
authors.forename: Takashi
authors.initials: T
authors.lastname: Funaki
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Yatabe
authors.forename: Yasuzo
authors.initials: Y
authors.lastname: Suzuki
authors.forename: Seiko
authors.initials: S
authors.lastname: Miyamoto
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Shimoi
authors.forename: Shuji
authors.initials: S
authors.lastname: Abe
mesh_terms: D015082:2,2'-Dipyridyl / Q000737:chemistry* / Q000378:metabolism; D007700:Kinetics; D008958:Models, Molecular; D009944:Organoplatinum Compounds / Q000737:chemistry* / Q000378:metabolism; D011687:Purines / Q000737:chemistry* / Q000378:metabolism; D011725:Pyridines / Q000737:chemistry* / Q000378:metabolism; D011743:Pyrimidines / Q000737:chemistry* / Q000378:metabolism; D011804:Quinolines / Q000737:chemistry* / Q000378:metabolism; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet
chemical_list: D009944:Organoplatinum Compounds; D011687:Purines; D011725:Pyridines; D011743:Pyrimidines; D011804:Quinolines; D015082:2,2'-Dipyridyl