Insertion of heteroallenes into the rhenium-hydride bond |
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Authors: | Gabriele Albertin Stefano Antoniutti Giovanni Roveda |
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Institution: | Dipartimento di Chimica, Università Ca’ Foscari di Venezia, Dorsoduro, 2137, 30123 Venezia, Italy |
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Abstract: | Dithioformato Re{η2-SC(H)S}(NO)P3]BPh4 (1), thioformamido Re{η2-RNC(H)S}(NO)P3]BPh4 (2) (R = Et, p-tolyl), formamido Re{η2-PhNC(H)O}(NO)P3]BPh4 (3) and formamidinato Re{η2-p-tolylNC(H)Np-tolyl}(NO)P3]BPh4 (4) (P = PPh2OEt) complexes were prepared by allowing the hydride ReH2(NO)P3 to react first with triflic acid and then with the appropriate heteroallene CS2, RNCS, PhNCO and p-tolylNCNp-tolyl. Treatment of the ReH2(NO)L(PPh3)2 L = P(OEt)3, PPh(OEt)2] and ReH2(NO)(PPh3)3 hydrides first with triflic acid and then with isothiocyanate RNCS (R = Et, p-tolyl) gave the Re{η2-RNC(H)S}(NO){P(OEt)3}(PPh3)2]BPh4 (5, 6) and Re(η2-RNC(H)S)(NO)(PPh3)3]BPh4 (7) derivatives. Depending on the nature of the phosphite, instead, the reaction of ReH2(NO)L(PPh3)2 and ReH2(NO)(PPh3)3 hydrides first with CF3SO3H and then with isocyanate R1NCO (R1 = Ph, p-tolyl) gave the chelate Re{η2-R1NC(H)O}(NO){P(OEt)3}(PPh3)2]BPh4 (8) and Re{η2-R1NC(H)O}(NO)(PPh3)3]BPh4(10) complexes with P(OEt)3 or PPh3, while the η1-coordinate Re{η1-RNC(H)S}(NO){PPh(OEt)2}2(PPh3)2]BPh4 (9) derivative was obtained with the PPh(OEt)2 phosphite ligand. η1-Coordinate dithioformato Re{η1-SC(H) S}(NO){PPh(OEt)2}2(PPh3)2]BPh4 (11) and formato Re{η1-OC(H) O}(NO){PPh(OEt)2}2(PPh3)2]BPh4 (12) complexes, as well as the formamidinato Re{η2-p-tolylNC(H)Np-tolyl}(NO){P(OEt)3}(PPh3)2]BPh4 (13) derivative were also prepared. |
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Keywords: | Formamido Thioformamido Formato Dithioformato Heteroallenes Hydride P ligands Rhenium |
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