{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T11:27:08Z","timestamp":1778153228477,"version":"3.51.4"},"reference-count":29,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2005,5,9]],"date-time":"2005-05-09T00:00:00Z","timestamp":1115596800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rapid Comm Mass Spectrometry"],"published-print":{"date-parts":[[2005,6,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The complexes of transition\u2010metal ions (M\n                    <jats:sup>2+<\/jats:sup>\n                    , where M\u2009=\u2009Fe, Co, Ni, Cu, Zn, Cd, and Hg) with 2\u2010acetylbenzimidazolethiosemicarbazone (L) are studied under electrospray ionization (ESI) conditions. The ESI mass spectra of Fe and Co complexes showed the complex ions corresponding to [M+2L\u20132H]\n                    <jats:sup>+<\/jats:sup>\n                    , and those of Ni and Zn complexes showed [M+2L\u2013H]\n                    <jats:sup>+<\/jats:sup>\n                    ions, wherein the metal\/ligand ratio is 1:2 and the oxidation state of the central metal ion is +3 in the case of Fe and Co and +2 in the case of Ni and Zn. The Cd and Cu complexes showed preferentially 1:1 complex ions, i.e., [M+L\u2013H]\n                    <jats:sup>+<\/jats:sup>\n                    or [M+L+Cl]\n                    <jats:sup>+<\/jats:sup>\n                    , whereas Hg formed both 1:1 and 1:2 complex ions. During formation of the above complex ions one or two ligands are deprotonated after keto\u2010enol tautomerism, depending on the nature and oxidation state of central metal ion. The structures and coordination numbers of the metal ions in the complex ions were studied by their collision\u2010induced dissociation spectra and ion\u2010molecule reactions with acetonitrile or propylamine in the collision cell. Based on these results it is concluded that Fe, Co, Ni and Zn form stable octahedral complexes, whereas tetrahedral or square planar complexes are formed preferentially for other metals. In addition, the Cu complex showed a [2L+2Cu\u20133H]\n                    <jats:sup>+<\/jats:sup>\n                    ion with a Cu\uf8ffCu bond. Copyright \u00a9 2005 John Wiley &amp; Sons, Ltd.\n                  <\/jats:p>","DOI":"10.1002\/rcm.1954","type":"journal-article","created":{"date-parts":[[2005,5,9]],"date-time":"2005-05-09T05:47:20Z","timestamp":1115617640000},"page":"1536-1544","source":"Crossref","is-referenced-by-count":19,"title":["Electrospray ionization studies of transition\u2010metal complexes of 2\u2010acetylbenzimidazolethiosemicarbazone using collision\u2010induced dissociation and ion\u2010molecule reactions"],"prefix":"10.1002","volume":"19","author":[{"given":"G.","family":"Bhaskar","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. Adharvana","family":"Chary","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. Kiran","family":"Kumar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Syamasundar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.","family":"Vairamani","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Prabhakar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,5,11]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/192341a0"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr60289a001"},{"key":"e_1_2_6_4_2","first-page":"1069","volume":"63","author":"Singh B","year":"1986","journal-title":"J. Indian Chem. 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