Stabilization of the (η4-COD)Pt-fragment (COD=η2,η2-cyclo-octa-1,5-diene) by a bistriazenide: Synthesis and X-ray structural characterization of [(η4-COD)Pt(NNN-Ph)2C6H4], a neutral 1,2-bis(phenyltriazenido)benzene complex of platinum(II)

The diazotisation of 2,2Ј-diaminotolane with one equivalent of HNO 2 yields the macrocyclic bis(tolanetriazene) (tolaneN 3 H) 2 in moderate yield. As shown by the crystal structure determination, the molecule is essentially planar. After deprotonation, the central cavity is suitable for complexation of transition metal ions. In pyridine solution, the anion (tolaneN 3 ) 2 2-is formed, which reacts with the acetates of Co 2+and Ni 2+ to the dark red coloured complexes [M((tolaneN 3 ) 2 )-(py) 2 ]. The metal ions are located in the centre of the macrocycles, coordinated by four N atoms of the two triazenide

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A Macrocyclic Bistriazene and its Complexes with Divalent Metal Ions

Beck

Hörner

Dittmann

2009

Eur J Inorg Chem

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Platinum Diolefin Complexes – Synthesis, Structures, and Cytotoxicity

et al. 2014

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The synthesis, spectroscopy, structures and chemical reactivity of platinum(II) diolefin complexes cis‐[(∥∧∥)PtCl2], cis‐[(∥∧∥)PtCl(R)] and cis‐[(∥∧∥)Pt(R)2] [∥∧∥ = chelate diolefin ligand: 1,5‐cyclooctadiene (COD), 1,5‐dimethylocta‐1,5‐diene (Me2COD), norbornadiene (NBD), 1,5‐hexadiene (HEX), 3‐allyloxypropene (All2O, diallyl ether), diallylamine (All2NH); R = Me, Bn, C6F5, C6F4H‐4 (or ‐5), or C≡C(4‐Me)Ph] have been explored. The relative exchange rates of the cis‐[(∥∧∥)PtCl2] complexes towards the diimine ligand diisopropyl‐1,4‐diazabutadiene (iPr‐DAB) increased along the series COD < Me2COD < NBD < HEX < All2O by a factor of 4. The presumably dimeric complex [(All2NH)PtCl2]2 undergoes a unique rearrangement process in dimethyl sulfoxide (DMSO) solution to yield the dimeric piperazine complex [PtCl(dmso)(C6H10N)]2, which has been characterised by single‐crystal XRD. For selected platinum complexes, cytotoxic effects in HT‐29 colon carcinoma and MCF‐7 breast cancer cell lines were evaluated. For comparison, the dicationic complexes [(COD)Pt(Bn)(L)][PF6]2 with the very labile coligands N‐methyl‐4,4′‐bipyridinium (MQ+) and N‐methyl‐1,4‐pyrazinium (Mpz+) were added to the study. Although the hexadiene complexes [(HEX)Pt(C6F4H‐4)2] and [(HEX)Pt(C6F4H‐5)2] show strong cytotoxicity, the introduction of labile diolefin ligands or the labile cationic MQ+ or Mpz+ coligands does not generally lead to markedly increased cytotoxicity.

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Platinum bis (phosphine) complexes of 1,8-naphthosultam

Diamond

Knight

Randall

et al. 2014

Inorganica Chimica Acta

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Stabilization of the (η4-COD)Pt-fragment (COD=η2,η2-cyclo-octa-1,5-diene) by a bistriazenide: Synthesis and X-ray structural characterization of [(η4-COD)Pt(NNN-Ph)2C6H4], a neutral 1,2-bis(phenyltriazenido)benzene complex of platinum(II)

Cited by 9 publications

References 22 publications

A Macrocyclic Bistriazene and its Complexes with Divalent Metal Ions

A Macrocyclic Bistriazene and its Complexes with Divalent Metal Ions

Platinum Diolefin Complexes – Synthesis, Structures, and Cytotoxicity

Platinum bis (phosphine) complexes of 1,8-naphthosultam

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