2002
DOI: 10.1021/ic010696c
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Synthesis, Characterization, and Chiral Behavior of S-Bridged CoIIIPtIICoIII Trinuclear Complexes Composed of Bis(thiolato)-Type Octahedral Units cis(S)-[Co(aet)2(en)]+ and/or trans(N)-[Co(d-pen- N,O,S)2]- (aet = 2-Aminoethanethiolate, d-pen = d-Penicillaminate)

Abstract: A series of linear-type Co(III)Pt(II)Co(III) trinuclear complexes composed of C(2)-cis(S)-[Co(aet)(2)(en)](+) (aet = 2-aminoethanethiolate) and/or Lambda(D)-trans(N)-[Co(D-pen-N,O,S)(2)](-) (D-pen = D-penicillaminate) were newly prepared, and their chiral behavior, which is markedly different from that of the corresponding Co(III)Pd(II)Co(III) complexes, is reported. The 1:1 reaction of an S-bridged Co(III)Ni(II)Co(III) trinuclear complex, [Ni[Co(aet)(2)(en)](2)]Cl(4), with K(2)[PtCl(4)] in water gave an S-bri… Show more

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Cited by 18 publications
(17 citation statements)
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“…3 3). 16 The dihedral angle between the Pt1S1S2 and Pt1S4S5 planes in (−) 3 CD 30 -[2a] 2+ is 5.6°, which is much smaller than that in DD/KK-[Pt{Co(aet) 2 (en)} 2 ] 4+ (13.1°).…”
Section: Synthesis and Characterization Of [Pt{co(aet) 3 } 2 ] 2+ ([2...mentioning
confidence: 96%
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“…3 3). 16 The dihedral angle between the Pt1S1S2 and Pt1S4S5 planes in (−) 3 CD 30 -[2a] 2+ is 5.6°, which is much smaller than that in DD/KK-[Pt{Co(aet) 2 (en)} 2 ] 4+ (13.1°).…”
Section: Synthesis and Characterization Of [Pt{co(aet) 3 } 2 ] 2+ ([2...mentioning
confidence: 96%
“…Noteworthy here is that both the racemic (DD/KK) and meso (DK) forms have been formed for [Pt{Co(aet) 2 (en)} 2 ] 4+ , which has been explained by the inertness of Pt-S bonds. 16 One may assume that the Pt-S bonds in the Co III Pt II Co III structure are weakened by the replacement of the terminal en ligands in [Pt{Co(aet) 2 (en)} 2 ] 4+ by aet ligands, allowing the intermolecular exchange of the [Co(aet) 3 ] units to form the more stable racemic form. However, the Pt-S bond distances in KK-[2a] 2+ and KK/DD-[2b] 2+ are quite similar to those in DD/KKand DK-[Pt{Co(aet) 2 (en)} 2 ] 4+ .…”
Section: Stereochemical Propertiesmentioning
confidence: 99%
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“…Since the establishment of Werner's coordination theory by his pioneering research on the optical resolution of chiral cobalt(III) complexes, chirality has been one of the most important and fascinating subject in coordination chemistry. During the past decade, much attention has been drawn to this subject in the field of coordination stereochemistry, associated with the growing interest in the design and creation of well-organized polynuclear and metallo-supramolecular species, the overall structures of which can be controlled by chirality of their building units. , Our research interest has been directed toward this subject, based on tris(chelate)-type cobalt(III) complexes with simple aminothiolate ligands such as 2-aminoethanethiolate (aet) and l -cysteinate ( l -cys), which are linked by transition metal ions to form a variety of S-bridged polynuclear and polymeric structures. …”
Section: Introductionmentioning
confidence: 99%