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Alkenyl isomerization at a diiron centre.
(Amer Chemical Soc, 2001) Hogarth, G; Doherty, S; Senturk, OS
alpha-beta Alkenyl isomerisation at diiron centres
(Royal Soc Chemistry, 2001) Anwar, MK; Hogarth, G; Senturk, OS; Clegg, W; Doherty, S; Elsegood, MRJ
alpha -Substituted alkenyl complexes [Fe-2(CO)(6)(mu -RC=CH2)(mu -PPh2)] 1a-1e (R = Ph, Me, Pr-n, Bu-n or Bu-t) have been prepared via regioselective hydrodimetallation of primary alkynes by [Fe2H(CO)(7)(mu -PPh2)]. Thermolysis in toluene results in isomerisation to the beta -substituted complexes [Fe-2(CO)(6)(mu -HC=CHR)(mu -PPh2)] 2a-2e. Isomerisation is accelerated in the presence of a range of tertiary phosphines yielding [Fe-2(CO)(5)(PR'(3))(mu -HC=CHR)(mu -PPh2)] 3a-3j in which the phosphine is coordinated to the sigma -bound metal centre and lies trans to the phosphido-bridge. Addition of trimethyl phosphite to [Fe-2(CO)(6)(mu -PhC=CH2)(mu -PPh2)] 1a at 60-70 degreesC affords mono- and di-substituted alpha -alkenyl complexes [Fe-2(CO)(5){P(OMe)(3)}(mu -PhC=CH2)(mu -PPh2)] 4 and [Fe-2(CO)(4){P(OMe)(3)}(2)(mu -PhC=CH2)(mu -PPh2)] 5 respectively. Above 100 degreesC, conversion into the beta -substituted isomers [Fe-2(CO)(5){P(OMe)(3)}(mu -HC=CHPh)(mu -PPh2)] 6 and [Fe-2(CO)(4){P(OMe)(3)}(2)(mu -HC=CHPh)(mu -PPh2)] 7 occurs cleanly. Crystallographic studies have been carried out on 1a, [Fe-2(CO)(6)(mu -(PrC)-C-n=CH2)(mu -PPh2)] 1c, [Fe-2(CO)(6)(mu -HC=CHPh)(mu -PPh2)] 2a, [Fe-2(CO)(5)(PPh3)(mu -HC=CHPh)(mu -PPh2)] 3a, 6 and 7 and compared with related structures. Different structural characteristics are seen between isomers, beta isomers being characterised by a longer Fe-pi-C-beta interaction and a more obtuse Fe-sigma-C-alpha-C-beta angle. The mechanisms of alkyne addition to [Fe2H(CO)(7)(mu -PPh2)] and alkenyl isomerisation have been probed using PhC2D. Hydrodimetallation results in an equal distribution of the deuterium over both beta sites in 1a, and since they do not in exchange on the NMR timescale suggests that a radical process is operating. Thermolysis of this mixture leads to a 3 : 1 mixture of [Fe-2(CO)(6)(mu -DC=CHPh)(mu -PPh2)] 2a-d(alpha)(1) and [Fe-2(CO)(6)(mu -HC=CDPh)(mu -PPh2)] 2a-d(beta)(1). A mechanism for alpha-beta alkenyl isomerisation is proposed in which oxidative additions of the trans (exo) and cis (endo) beta -protons to terminal sites on the diiron centre, giving a parallel alkyne intermediate, are in competition.
Photochemical and thermal synthesis of metal carbonyl complexes of tetraalkyl diphosphine disulfides [M(CO)(4)(R(2)P(S)P(S)R(2)] M=Mo, W; R=Me, Et, Pr-n, Bu-n)
(Pergamon-Elsevier Science Ltd, 1997) Almond, MJ; Sarikahya, F; Senturk, OS
The new complexes [M(CO)(4)(R(2)P(S)P(S)R(2))], 1A-1D, 2A-2D, (1A,M = Mo, R = Me; 1B, M = Mo, R = Et; 1C, M = Mo, R = Pr-n; 1D, M = Mo, R = Bu-n; 2A, M = W, R = Me; 2B; M = W, R = Et; 2C, M = W, R = Pr-n; 2D, M = W, R = Bu-n) have been prepared either by the photochemical reaction of M(CO)(6) with R(2)P(S)P(S)R(2), or by thermal displacement of coordinated norbornadiene in C7H8Mo(CO)(4) with R(2)P(S)P(S)R(2), to give the complexes [M(CO)(4)(R(2)P(S)P(S)R(2))]. The complexes have been characterized by elemental analysis, IR and P-31-[H-1]-NMR spectroscopy and FAB-Mass spectrometry; the spectroscopic studies suggest a cis-chelate bidentate coordination of the ligand. Copyright (C) 1997 Elsevier Science Ltd.
Photochemical reactions of chromium hexacarbonyl with tetraalkyldiphosphine disulfides
(Kluwer Academic Publ, 2002) Sert, S; Senturk, OS; Ugur, F
New complexes [Cr(CO)(4) (R2P(S)P(S)R-2)] and [Cr-2(CO)(10)(mu-R2P(S)P(S)R-2)] ( R=Me, Et, Pr-n, Bu-n), (1a)-(1d) and (2a)-(2d) [(1a), R=Me; (1b), R=Et; (1c), R=Pr-n; (1d), R=Bu-n; (2a), R=Me; (2b), R=Et; (2c), R=Pr-n; (2d), R=Bu-n] have been prepared by the photochemical reaction of Cr(CO)(6) with (RP)-P-2(S)P(S)R-2 (R=Me, Et, Pr-n and Bu-n) and characterized by elemental analyses, FT-i.r., P-31-[H-1]-n.m.r. spectroscopy and FAB-mass spectrometry. The spectroscopic data suggest cis-chelate bidentate coordination of the ligand in [Cr(CO)(4)(R2P(S)P(S)R-2)] and cis-bridging bidentate coordination of the ligand between two metals in [Cr-2(CO)(10)(mu-R2P(S)P(S)R-2)] (R=Me, Et, Pr-n and Bu-n).
Photochemical reactions of M(CO)(6) (M = Cr, Mo, W) with Ph2P(S)P(S)Ph-2
(Kluwer Academic Publ, 2003) Sert, S; Senturk, OS; Ugur, F
New complexes {M(CO)(4)[Ph2P(S)P(S)Ph-2]} (M = Cr, Mo and W), (1a)-(3a), [(1a), M = Cr; (2a), M = Mo; (3a), M = W] and {M-2(CO)(10)[mu-Ph2P(S)P(S)Ph-2]} (M = Cr, Mo, W), [(1b)-(3b) [(1b), M = Cr; (2b), M = Mo; (3b), M = W] have been prepared by the photochemical reaction of M(CO)(6) with Ph2P(S)P(S) Ph-2 and characterized by elemental analyses, f.t.-i.r. and P-31-(H-1)-n.m.r. spectroscopy and by FAB-mass spectrometry. The spectra suggest cis-chelate bidentate coordination of the ligand in {M(CO)(4)[Ph2P(S)P(S)Ph-2]} and cis-bridging bidentate coordination of the ligand between two metals in (M = Cr, Mo and W).
Photochemical reactions of M(CO)(6) (M = Cr, Mo, W) with Ph2P(S)P(S)Ph-2
(Kluwer Academic Publ, 2003) Sert, S; Senturk, OS; Ugur, F
New complexes {M(CO)(4)[Ph2P(S)P(S)Ph-2]} (M = Cr, Mo and W), (1a)-(3a), [(1a), M = Cr; (2a), M = Mo; (3a), M = W] and {M-2(CO)(10)[mu-Ph2P(S)P(S)Ph-2]} (M = Cr, Mo, W), [(1b)-(3b) [(1b), M = Cr; (2b), M = Mo; (3b), M = W] have been prepared by the photochemical reaction of M(CO)(6) with Ph2P(S)P(S) Ph-2 and characterized by elemental analyses, f.t.-i.r. and P-31-(H-1)-n.m.r. spectroscopy and by FAB-mass spectrometry. The spectra suggest cis-chelate bidentate coordination of the ligand in {M(CO)(4)[Ph2P(S)P(S)Ph-2]} and cis-bridging bidentate coordination of the ligand between two metals in (M = Cr, Mo and W).
Photochemical reactions of metal carbonyls [M(CO)(6) (M=Cr, Mo and W), Re(CO)(5)Br, Mn(CO)(3)Cp] with 2-hydroxyacetophenone methanesulfonylhydrazone (apmsh)
(Kluwer Academic Publ, 2003) Ozdemir, U; Karacan, N; Senturk, OS; Sert, S; Ugur, F
Five new complexes, [M(CO)(5)(apmsh)] [M = Cr; (1), Mo; (2), W; (3)], [Re(CO)(4)Br(apmsh)] (4) and [Mn(CO)(3)(apmsh)] (5) have been synthesized by the photochemical reaction of metal carbonyls [M(CO)(6)] (M = Cr, Mo and W), [Re(CO)(5)Br], and [Mn(CO)(3)Cp] with 2-hydroxyacetophenone methanesulfonylhydrazone (apmsh). The complexes have been characterized by elemental analysis, mass spectrometry, f.t.-i.r. and H-1 spectroscopy. Spectroscopic studies show that apmsh behaves as a monodentate ligand coordinating via the imine N donor atom in [M(CO)(5)(apmsh)] (1-4) and as a tridentate ligand in (5).
Photochemical reactions of metal carbonyls [M(CO)(6) (M=Cr, Mo and W), Re(CO)(5)Br, Mn(CO)(3)Cp] with 2-hydroxyacetophenone methanesulfonylhydrazone (apmsh)
(Kluwer Academic Publ, 2003) Ozdemir, U; Karacan, N; Senturk, OS; Sert, S; Ugur, F
Five new complexes, [M(CO)(5)(apmsh)] [M = Cr; (1), Mo; (2), W; (3)], [Re(CO)(4)Br(apmsh)] (4) and [Mn(CO)(3)(apmsh)] (5) have been synthesized by the photochemical reaction of metal carbonyls [M(CO)(6)] (M = Cr, Mo and W), [Re(CO)(5)Br], and [Mn(CO)(3)Cp] with 2-hydroxyacetophenone methanesulfonylhydrazone (apmsh). The complexes have been characterized by elemental analysis, mass spectrometry, f.t.-i.r. and H-1 spectroscopy. Spectroscopic studies show that apmsh behaves as a monodentate ligand coordinating via the imine N donor atom in [M(CO)(5)(apmsh)] (1-4) and as a tridentate ligand in (5).
Photochemical reactions of metal carbonyls [M(CO)(6) (M=Cr, Mo, W), Re(CO)(5)Br, Mn(CO)(3)CP] with 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (DTTT) and the crystal structure of [W(CO)(5)(DTTT)]
(Pergamon-Elsevier Science Ltd, 2003) Sert, S; Ercag, A; Senturk, OS; Sterenberg, BT; Udachin, KA; Ozdemir, U; Sarikahya, FU
Five new complexes, [M(CO)(5)(DTTT)] [M = Cr; 1, Mo; 2, W; 3], [Re(CO)(4)Br(DTTT)] (4) and [Mn(CO)(2)Cp(DTTT)] (5) have been synthesized by the photochemical reaction of metal carbonyls [M(CO)(6)] (M = Cr, Mo and W), [Re(CO)(5)Br], and [Mn(CO)(3)Cp] with 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (DTTT). The complexes have been characterized by elemental analysis, mass spectrometry, FTIR, H-1 and C-13{H-1} NMR spectroscopy. The spectroscopic studies show that DTTT behaves as a monodentate ligand coordinating via the sulfur (C=S) donor atom in 1-5. An X-ray diffraction study Of [W(CO)(5)(DTTT)] (3) confirms that the tungsten adopts a distorted octahedral geometry with local C-4nu symmetry. (C) 2003 Elsevier Science Ltd. All rights reserved.
Photochemical reactions of metal carbonyls [M(CO)(6) (M=Cr, Mo, W), Re(CO)(5)Br, Mn(CO)(3)CP] with 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (DTTT) and the crystal structure of [W(CO)(5)(DTTT)]
(Pergamon-Elsevier Science Ltd, 2003) Sert, S; Ercag, A; Senturk, OS; Sterenberg, BT; Udachin, KA; Ozdemir, U; Sarikahya, FU
Five new complexes, [M(CO)(5)(DTTT)] [M = Cr; 1, Mo; 2, W; 3], [Re(CO)(4)Br(DTTT)] (4) and [Mn(CO)(2)Cp(DTTT)] (5) have been synthesized by the photochemical reaction of metal carbonyls [M(CO)(6)] (M = Cr, Mo and W), [Re(CO)(5)Br], and [Mn(CO)(3)Cp] with 3,5-dimethyl-tetrahydro-2H-1,3,5-thiadiazine-2-thione (DTTT). The complexes have been characterized by elemental analysis, mass spectrometry, FTIR, H-1 and C-13{H-1} NMR spectroscopy. The spectroscopic studies show that DTTT behaves as a monodentate ligand coordinating via the sulfur (C=S) donor atom in 1-5. An X-ray diffraction study Of [W(CO)(5)(DTTT)] (3) confirms that the tungsten adopts a distorted octahedral geometry with local C-4nu symmetry. (C) 2003 Elsevier Science Ltd. All rights reserved.
Photochemical reactions of Re(CO)(5)Br with Ph2P(CH2)n PPh2 (n=1, dppm; 2, dppe; 3, dppp)
(Kluwer Academic Publ, 2004) Subasi, E; Ugur, F; Senturk, OS
The new complexes fac-[Re(CO)(3)Br{Ph2P(CH2)(n)PPh2}] (1a-3a) [(1a), n = 1; (2a), n = 2; (3a), n = 3] and [Re-2(CO)(8)Br-2{mu-Ph2P(CH2)(n)PPh2}] (1b-3b) [(1b), n = 1; (2b), n = 2; (3b), n = 3] have been prepared by the photochemical reaction of Re(CO)(5)Br with Ph2P(CH2)(n)PPh2 (n = 1, dppm; 2, dppe; 3, dppp). The complexes have been characterized by elemental analysis, mass spectroscopy, f.t.-i.r. and P-31-[H-1]-n.m.r. spectrometry. The spectroscopic studies suggest cis-chelate bidentate coordination of the ligand in fac-[Re(CO)(3)Br{Ph2P(CH2)(n)PPh2}] (1a-3a) and cis-bridging bidentate coordination of the ligand between two metals in [Re-2(CO)(8)Br-2{cis-mu-Ph2P(CH2)(n)PPh2}] (1a-3a).
Photochemical reactions of Re(CO)(5)Br with Ph2P(S)(CH2)(n)P(S)Ph-2 (n=1,2,3)
(Walter De Gruyter Gmbh, 2004) Subasi, E; Senturk, OS; Ugur, F
The complexes fac-[Re(CO)(3)Br{Ph2P(S)(CH2)(n)P(S)Ph-2}] [1a, n = 1; 2a, n = 2; 3a, n = 3] and [Re-2(CO)(8)Br-2{mu-Ph2P(S)(CH2)(n)P(S)Ph-2}] [1b, n = 1; 2b, n = 2; 3b, n = 3] have been prepared by the photochemical reaction of Re(CO)(5)Br with Ph2P(S)(CH2)(n)P(S)Ph-2. The products have been characterized by elemental analysis, mass spectroscopy, FT-IR and P-31-[H-1]-NMR spectrometry. The results suggest cis-chelate bidentate coordination of the ligand in fac-1a-3a and cis-bridging bidentate coordination of the ligand between two metals in 1b - 3b.
Photochemical reactions of Re(CO)(5)Br with tetraalkyldiphosphine disulfides (R=Me, Et, Pr-n, Bu-n, Ph) and the crystal structure of [ReBr(CO)(3)(Et2P(S)P(S)Et-2)]
(Pergamon-Elsevier Science Ltd, 2003) Senturk, OS; Shekhel, HA; Sterenberg, BT; Udachin, KA; Sert, S; Ozdemir, U; Sarikahya, FU
The hitherto unknown series of complexes fac-[Re(CO)(3)Br{R2P(S)P(S)R-2}] 1a-5a (1a, R = Me; 2a, R = Et; 3a, R = Pr-n; 4a, R = Bu-n; 5a, R = Ph) and [Re-2(CO)(8)Br-2{cis-mu-R2P(S)P(S)R-2}] 1b-5b [1b, R = Me; 2b, R = Et; 3b, R = Pr-n; 4b, R = Bu-n; 5b, R = Ph] have been prepared by the photochemical reaction of Re(CO)(5)Br with R2P(S)P(S)R-2. The complexes have been characterized by elemental analysis, mass spectroscopy (EI), FT-IR and P-31{H-1} NMR spectrometry. The spectroscopic studies suggest cis-chelate bidentate coordination of the ligand in fac-[Re(CO)(3)Br{R2P(S)P(S)R-2}] and cis-bridging bidentate coordination of the ligand between two metals in [Re-2(CO)(8)Br-2{cis-mu-R2P(S)P(S)R-2}] (R = Me, Et, Pr-n, Bu-n, Ph). An X-ray diffraction study of [ReBr(CO)(3)(Et2P(S)P(S)Et-2)] confirms that the rhenium, adopts a distorted octahedral geometry with local C-5 symmetry. (C) 2003 Elsevier Science Ltd. All rights reserved.
Photochemical reactions of Re(CO)(5)Br with tetraalkyldiphosphine disulfides (R=Me, Et, Pr-n, Bu-n, Ph) and the crystal structure of [ReBr(CO)(3)(Et2P(S)P(S)Et-2)]
(Pergamon-Elsevier Science Ltd, 2003) Senturk, OS; Shekhel, HA; Sterenberg, BT; Udachin, KA; Sert, S; Ozdemir, U; Sarikahya, FU
The hitherto unknown series of complexes fac-[Re(CO)(3)Br{R2P(S)P(S)R-2}] 1a-5a (1a, R = Me; 2a, R = Et; 3a, R = Pr-n; 4a, R = Bu-n; 5a, R = Ph) and [Re-2(CO)(8)Br-2{cis-mu-R2P(S)P(S)R-2}] 1b-5b [1b, R = Me; 2b, R = Et; 3b, R = Pr-n; 4b, R = Bu-n; 5b, R = Ph] have been prepared by the photochemical reaction of Re(CO)(5)Br with R2P(S)P(S)R-2. The complexes have been characterized by elemental analysis, mass spectroscopy (EI), FT-IR and P-31{H-1} NMR spectrometry. The spectroscopic studies suggest cis-chelate bidentate coordination of the ligand in fac-[Re(CO)(3)Br{R2P(S)P(S)R-2}] and cis-bridging bidentate coordination of the ligand between two metals in [Re-2(CO)(8)Br-2{cis-mu-R2P(S)P(S)R-2}] (R = Me, Et, Pr-n, Bu-n, Ph). An X-ray diffraction study of [ReBr(CO)(3)(Et2P(S)P(S)Et-2)] confirms that the rhenium, adopts a distorted octahedral geometry with local C-5 symmetry. (C) 2003 Elsevier Science Ltd. All rights reserved.
Photochemical synthesis of metal carbonyl complexes of tetraalkyldiphosphine disulfides, [M-2(CO)(10)(mu-R2P(S)P(S)R-2)] (M = Mo, W; R = Me, Et, n-Pr, n-Bu)
(Marcel Dekker Inc, 2001) Senturk, OS; Ugur, F
The new complexes [M-2(CO)(10)(mu-R2P(S)P(S)R-2)] (M = Mo, W: R = Me, Et, n-Pr, n-Bu), (1a)-(1d) and (2a)-(2d) [(1a), M = Mo, R = Me, (1b). M = Mo, R = Et; (1c), M = Mo, R = n-Pr, (1d), M = Mo, R = n-Bu. (2a), M = W, R = Me, (2b), M = W, R = Et, (2c), M = W, R n-Pr, (2d). M = W, R = n-Bu] have been prepared by the photochemical reaction of M(CO)(6) with R2P(S)P(S)R-2 (R = Me, Et, n-Pr, n-Bu). The complexes have been characterized by elemental analyses, FT-IR and P-31-[H-1]-NMR spectroscopy and FAB-mass spectrometry. The spectroscopic studies suggest cis-bridging bidentate coordination of the ligand between the two metals.
Preparation of complexes formed in the reaction between dicobaltoctacarbonyl and tetraalkyldiphosphine disulfides, R2P(S)P(S)R-2 (R = Me, Et, n-Pr, n-Bu)
(Marcel Dekker Inc, 2000) Ugur, F; Senturk, OS; Topaloglu, I
Co-2(CO)(8) and R2P(S)P(S)R-2 (R = Me, Et, n-Pr, n-Bu) react to form the three types of cluster complexes [Co-2(mu -CO)(mu (4)-S)(CO)(4)](2), (1), [Co-4(CO)(9)(mu (3)-S)(mu -PR2)(2)] (2A)-(2D), [(2A), R = Me; (2B), R = Et; (2C), R = n-Pr; (2D), R = n-Bu] and [Co-3(CO)(7)(mu (3)-S)(SPR2)] (3A)-(3D), [(3A), R = Me; (3B), R = Et; (3C), R = n-Pr; (3D), R = n-Bu]. The structure of (2A) and the disubstituted triphenylphosphine derivative of(3A) were reported previously. The complexes have been characterized by elemental analyses, FT-LR and P-31-[H-1] NMR spectroscopy and mass spectrometry.
Synthesis and characterization of metal carbonyl complexes of M(CO)(6)(M = Cr, Mo, and W), Re(CO)(5)Br, and Mn(CO)(3)CP with - Acetonemethanesulfonylhydrazone (amsh) and methanesulfonylhydrazone (msh)
(Taylor & Francis Inc, 2004) Ozdemir, U; Karacan, N; Senturk, OS; Sert, S; Ugur, F
Ten new complexes, [M(CO)(5)(amsh)] [M = Cr; (1a), Mo; (2a), W; (3a)], [Re(CO)(4)Br(amsh)] (4a), and [Mn(CO)(2)(amsh)Cp] (5a) and [M(CO)(5) (msh)] [M = Cr; (1b); Mo, (2b); W, (3b)], [Re(CO)4Br(msh)], (4b), and [Mn(CO)(3)(msh)], (5b), have been synthesized by the photochemical reaction of the metal carbonyls [M(CO)(6)] (M = Cr, Mo, and W), [Re(CO)(5)Br], and [Mn(CO)(3)Cp] with acetonemethanesulfonylhydrazone (amsh) and methanesulfonyl hydrazine (msh). The complexes have been characterized by elemental analyses, mass spectrometry, FT-IR and H-1 NMR spectroscopy. The spectroscopic studies show that amsh and msh behave as a monodentate ligands coordinating via an imine N donor atom in (1a)-(5a) and a hydrazine N donor atom in (1b)-(5b).
Synthesis and characterization of metal carbonyls [M(CO)(6)(M = Cr, Mo, W), Re(CO)(5)Br, Mn(CO)(3)C-P] with 2-hydroxy-1-napthaldehyde ethanesulfonylhydrazone (nafesh)
(Verlag Z Naturforsch, 2003) Senturk, OS; Sert, S; Ozdemir, U
Five new complexes, M(CO)(5)(nafesh) (M = Cr (1), Mo (2), W (3)), Re(CO)(4)Br(nafesh) (4) and Mn(CO)(3)(nafesh) (5) have been synthesized by the photochemical reaction of metal carbonyls M(CO)(6) (M = Cr, Mo, W), Re(CO)(5)Br, and Mn(CO)(3)CP with 2-hydroxy-1-napthaldehyde ethane-sulfonylhydrazone (nafesh). The complexes have been characterized by elemental analysis, El mass spectrometry, FT-IR, H-1 NMR spectroscopy. The spectroscopic studies show that nafesh behaves as a monodentate ligand coordinating via imine N donor atom in M(CO)(5)(nafesh) (M = Cr, Mo, W) and Re(CO)(4)Br(nafesh) and as tridentate ligand in Mn(CO)(3)(nafesh).
Synthesis and characterization of metal carbonyls [M(CO)(6)(M = Cr, Mo, W), Re(CO)(5)Br, Mn(CO)(3)C-P] with 2-hydroxy-1-napthaldehyde ethanesulfonylhydrazone (nafesh)
(Verlag Z Naturforsch, 2003) Senturk, OS; Sert, S; Ozdemir, U
Five new complexes, M(CO)(5)(nafesh) (M = Cr (1), Mo (2), W (3)), Re(CO)(4)Br(nafesh) (4) and Mn(CO)(3)(nafesh) (5) have been synthesized by the photochemical reaction of metal carbonyls M(CO)(6) (M = Cr, Mo, W), Re(CO)(5)Br, and Mn(CO)(3)CP with 2-hydroxy-1-napthaldehyde ethane-sulfonylhydrazone (nafesh). The complexes have been characterized by elemental analysis, El mass spectrometry, FT-IR, H-1 NMR spectroscopy. The spectroscopic studies show that nafesh behaves as a monodentate ligand coordinating via imine N donor atom in M(CO)(5)(nafesh) (M = Cr, Mo, W) and Re(CO)(4)Br(nafesh) and as tridentate ligand in Mn(CO)(3)(nafesh).
Synthesis and characterization of some metal carbonyls with 2-hydroxyacetophenone ethanesulfonylhydrazone
(Elsevier Science Bv, 2003) Senturk, OS; Ozdemir, U; Sert, S; Karacan, N; Ugur, F
Five new complexes, [M(CO)(5)(apesh)] [M = Cr; (1), Mo; (2), W; (3)], [Re(CO)(4) Br(apesh)] (4) and [Mn(CO)(3)(apesh)] (5) have been synthesized by the photochemical reaction of metal carbonyls [M(CO)(6)] (M = Cr, Mo, W), [Re(CO)(5) Br], and [Mn(CO)3 Cp] with 2-hydroxyacetophenone ethanesulfonylhydrazone (apesh). The complexes have been characterized by elemental analysis, mass spectrometry, FT-IR, H-1 NMR spectroscopy. The spectroscopic studies show that apesh behaves as a monodentate ligand coordinating via imine N donor atom in (1)-(4) and as tridentate ligand in (5). (C) 2003 Elsevier Science B.V. All rights reserved.

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