title: ESI-MS studies of palladium (II) complexes with 1-(p-toluenesulfonyl)cytosine/cytosinato ligands.
abstract: The mononuclear complex Pd(1-TosC-N3)(2)Cl(2) (2) containing 1-(p-toluenesulfonyl)cytosine (1) as a ligand, as well as dinuclear complexes Pd(2)(1-TosC(-)-N3,N4)(4) (3) and Pd(2)(1-TosC(-)-N3,N4)(2)DMSO(2)Cl(2) (4) containing the ligand anion (1-TosC(-)), was mass analyzed by electrospray ionization ion trap MS/MS and high resolution MS. Complexes 3 and 4 were obtained by recrystallization of 2 from DMF and DMSO, respectively. The behavior of complex 2 in different solutions was monitored by electrospray ionization mass spectrometry (ESI-MS). Under the applied ESI-MS conditions, complex 2 in methanol reorganized itself dominantly as new complex 3 and the solvent did not coordinate the formed species. In H(2)O/DMSO, CH(3)CN/DMSO and CH(3)OH/DMSO solutions, complex 2 formed several new species with solvent molecules involved in their structure, e.g. complex 4 was formed as the major product. The newly formed species were also examined by LC-MS-DAD, confirming the solvent induced reorganization and the solution instability of complex 2.
authors.affiliation: Division of Organic Chemistry and Biochemistry, Ruder Bosković Institute, Bijenicka cesta 54, 10 000 Zagreb, Croatia. rkobetic@irb.hr
authors.forename: Renata
authors.initials: R
authors.lastname: Kobetić
authors.forename: Dubravka
authors.initials: D
authors.lastname: Gembarovski
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Visnjevac
authors.forename: Biserka
authors.initials: B
authors.lastname: Zinić
authors.forename: Vesna
authors.initials: V
authors.lastname: Gabelica-Marković
mesh_terms: D003596:Cytosine / Q000031:analogs & derivatives* / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D014105:Tosyl Compounds / Q000737:chemistry*
chemical_list: C509984:1-(4-toluenesulfonyl)cytosine; D014105:Tosyl Compounds; D010165:Palladium; D003596:Cytosine; D000432:Methanol; D004121:Dimethyl Sulfoxide