Synthesis and spectroscopic characterization of (CO)6Fe2{μ-EC(H)=C(2-Th)E′)(E,E′=S, Se, Te; Th=C4H3S) structural characterization of (CO)6Fe2{μ-SeC(H)=C(2-Th)Se}

Mathur, Purva; Dash, Aswini K.; Hossain, Md. Munkir; Satyanarayana, C.V.V.; Rheingold, Arnold L.; Yap, Glenn P. A.; Liable‐Sands, Louise M.

doi:10.1016/s0022-328x(97)00199-x

Cited by 18 publications

(21 citation statements)

References 39 publications

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“…The IR spectra of 1 and 2 display carbonyl stretching patterns typically observed in the spectra of compounds containing the Fe 2 (CO) 6 groups. The spectrum of compound 1 displays a carbonyl stretching pattern which is identical to that observed for earlier reported [{l-EC(H)@C(R)E 0 }-(CO) 6 Fe 2 ] (E, E 0 = S, Se,Te; R = Ph, Th, C"CCH 3 ) [9][10][11][12][13][14][15][16][17]. Compound 2 shows a band due to the presence of a ketonic carbonyl group at 1655 cm À1 , in addition to the terminal carbonyl bands.…”

Section: Resultssupporting

confidence: 86%

Photochemical reactions of Fe(CO)5 with FcCCH in the presence of S-powder and CS2: Synthesis and characterization of [{μ-SC(H)C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)C(Fc)S}(CO)6Fe2]; cis-[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(H)C(Fc)}(CO)6Fe2] and trans -[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(Fc)C(H)}(CO)6Fe2]

Mathur¹,

Singh²,

Singh³

et al. 2006

Journal of Organometallic Chemistry

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Section: Resultssupporting

confidence: 86%

Photochemical reactions of Fe(CO)5 with FcCCH in the presence of S-powder and CS2: Synthesis and characterization of [{μ-SC(H)C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)C(Fc)S}(CO)6Fe2]; cis-[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(H)C(Fc)}(CO)6Fe2] and trans -[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(Fc)C(H)}(CO)6Fe2]

Mathur¹,

Singh²,

Singh³

et al. 2006

Journal of Organometallic Chemistry

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“…373,374 The reaction of Fe 2 ( μ -S 2 )(CO) 6 and thiophenyl alkyne (C 4 H 3 S-2-C 2 H) is induced even with sodium acetate in methanol to give the 1,2-dithiolene. 376 …”

Section: Synthesis Of Diiron(i) Dithiolato Carbonyls From Iron(i) mentioning

confidence: 99%

Synthesis of Diiron(I) Dithiolato Carbonyl Complexes

2016

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Virtually all organosulfur compounds react with Fe(0) carbonyls to give the title complexes. These reactions are reviewed in light of major advances over the past few decades, spurred by interest in Fe2(μ-SR)2(CO)x centers at the active sites of the [FeFe]-hydrogenase enzymes. The most useful synthetic route to Fe2(μ-SR)2(CO)6 involves the reaction of thiols with Fe2(CO)9 and Fe3(CO)12. Such reactions can proceed via mono-, di-, and triiron intermediates. The reactivity of Fe(0) carbonyls toward thiols is highly chemoselective, and the resulting dithiolato complexes are fairly rugged. Thus, many complexes tolerate further synthetic elaboration directed at the organic substituents. A second major route involves alkylation of Fe2(μ-S2)(CO)6, Fe2(μ-SH)2(CO)6, and Li2Fe2(μ-S)2(CO)6. This approach is especially useful for azadithiolates Fe2[(μ-SCH2)2NR](CO)6. Elaborate complexes arise via addition of the FeSH group to electrophilic alkenes, alkynes, and carbonyls. Although the first example of Fe2(μ-SR)2(CO)6 was prepared from ferrous reagents, ferrous compounds are infrequently used, although the Fe(II)(SR)2 + Fe(0) condensation reaction is promising. Almost invariably low-yielding, the reaction of Fe3(CO)12, S8, and a variety of unsaturated substrates results in C–H activation, affording otherwise inaccessible derivatives. Thiones and related C═S-containing reagents are highly reactive toward Fe(0), often giving complexes derived from substituted methanedithiolates and C–H activation.

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“…It was suggested in [2] that this discrepancy is due to the large mass renormalization suffered by the state due to quantum corrections. This idea was further developed in [5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Black holes and elementary string states in N = 2 supersymmetric string theories

Sen

1998

J. High Energy Phys.

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We compare the logarithm of the degeneracy of BPS saturated elementary string states and the string modified Bekenstein-Hawking entropy of the corresponding black holes in N=2 supersymmetric heterotic string compactification to four dimensions. As in the case of N=4 supersymmetric theory, the two results match up to an overall undetermined numerical factor. We also show that this undetermined numerical constant is identical in the N=2 and N=4 supersymmetric theories, therby showing that the agreement between the Bekenstein-Hawking entropy and the microscopic entropy for N=2 theories does not require any new identity, other than the one already required for the N=4 theory. A similar result holds for type II string compactification as well.

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Synthesis and spectroscopic characterization of (CO)6Fe2{μ-EC(H)=C(2-Th)E′)(E,E′=S, Se, Te; Th=C4H3S) structural characterization of (CO)6Fe2{μ-SeC(H)=C(2-Th)Se}

Cited by 18 publications

References 39 publications

Photochemical reactions of Fe(CO)5 with FcCCH in the presence of S-powder and CS2: Synthesis and characterization of [{μ-SC(H)C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)C(Fc)S}(CO)6Fe2]; cis-[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(H)C(Fc)}(CO)6Fe2] and trans -[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(Fc)C(H)}(CO)6Fe2]

Photochemical reactions of Fe(CO)5 with FcCCH in the presence of S-powder and CS2: Synthesis and characterization of [{μ-SC(H)C(Fc)S}(CO)6Fe2], [μ-SC(O)C(H)C(Fc)S}(CO)6Fe2]; cis-[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(H)C(Fc)}(CO)6Fe2] and trans -[μ-η1:η2:η1:η1-{C(Fc)C(H)CS2C(Fc)C(H)}(CO)6Fe2]

Synthesis of Diiron(I) Dithiolato Carbonyl Complexes

Black holes and elementary string states in N = 2 supersymmetric string theories

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