1,2-Ethanedithiol

Conrow, Raymond E.

doi:10.1002/047084289x.re008

Cited by 1 publication

(1 citation statement)

References 26 publications

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“…The situation changes for the monohydro sesquifulvalene complexes, which reveal one electronic absorption band with λ max considerably smaller than λ(SHG) and a cut off at about 500 nm. (7), [25] formyl ruthenocene, [6] triphenylcarbenium hexafluorophosphate/tetrafluoroborate, [26] (tricarbonyl)(trispropionitrile)chromium(0), [27] (trisacetonitrile)(η 5 -cyclopentadienyl)-ruthenium() hexafluorophosphate, [28] (trisacetonitrile)(η 5 -pentamethylcyclopentadienyl)ruthenium() hexafluorophosphate, [29] (cylohepta-1,3,5-trienyl-1-methyl)diethylphosphonate [1d] were synthesised according to literature procedures.…”

Section: Resultsmentioning

confidence: 99%

Vinylogue Mono‐ and Bimetallic Cationic Sesquifulvalene and Monohydro Sesquifulvalene Complexes for Second Harmonic Generation

Meyer‐Friedrichsen

Wong²,

Prosenc

et al. 2003

Eur J Inorg Chem

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The donor‐acceptor complexes with a vinylogue monohydro sesquifulvalene and sesquifulvalene backbone of the type [(η5‐C5H5)Ru{µ‐(η5‐C5H4)C2H2(η6‐C7H7)}ML](PF6)n [n = 0: ML = none (1), Cr(CO)3 (2); n = 1: ML = Ru(η5‐C5H5) (3a), Ru(η5‐C5Me5) (3b)] and [(η5‐C5H5)Ru{µ‐(η5‐C5H4)C2H2(η7‐C7H6)}ML](PF6)n [n = 1: ML = none (4), Cr(CO)3 (5); n = 2: ML = Ru(η5‐C5H5) (6a), Ru(η5‐C5Me5) (6b)], respectively, have been synthesised, and spectroscopically and structurally characterised. A charge‐shift correlation was carried out by means of 1H NMR spectroscopic studies and an increased ground‐state donor‐acceptor interaction in the order 5 < 6b < 4 < 6a was found. The corresponding donor‐acceptor interaction in 3a and 3b varies by an insignificant amount. Hyper‐Rayleigh scattering (HRS) was applied to determine the first hyperpolarisability β of the mono‐ and dicationic complexes 3a−6b. The β values obtained for the cationic sesquifulvalene complexes 4−6b are among the largest ever measured for ruthenocenyl containing complexes due to a strong resonance enhancement: the sesquifulvalene complexes 4−6a, 6b show first hyperpolarisabilities which range between 360 and 700 × 10−30 esu, whereas β for the monohydrosesquifulvalene complexes are considerably lower (75 and 162 × 10−30 esu). For the latter complexes the first hyperpolarisability doubles on going from Ru(η5‐C5Me5) (3b) to Ru(η5‐C5H5) (3a) in the acceptor unit. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)

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