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• W2000794741 abstract "Acid-catalyzed reactions of the hydrazido(2−) complexes cis,mer-[WX2(NNH2)(PMe2Ph)3] (X = Cl, Br) with phthalaldehyde gave the (phthalimidin-2-yl)imido complexes cis,mer-[WX2(NNCH2C6H4CO)(PMe2Ph)3], via the condensation of the terminal NH2 group with one of the formyl groups and the following cyclization to form a phthalimidine ring. Crystal structure of the chloro complex 3a was unambiguously determined by X-ray analysis. Reaction of 3a with HBr liberated the (phthalimidin-2-yl)imido ligand as 2-aminophthalimidine in moderate yield, while treatment of 3a with KOH in THF selectively cleaved the N−N bond to give phthalimidine. A similar condensation of the hydrazido(2−) complex trans-[WF(NNH2)(dppe)2]+ (8a+; dppe = Ph2PCH2CH2PPh2) with phthalaldehyde resulted in the formation of the diazoalkane complex trans-[WF(NNCHC6H4CHO)(dppe)2]+. However, further treatment of the latter complex with AlCl3 afforded the corresponding (phthalimidin-2-yl)imido complex trans-[WF(NNCH2C6H4CO)(dppe)2]+. When 8a+ and its molybdenum analogue were reacted with 2,5-dimethoxy-2,5-dihydrofuran in the presence of a catalytic amount of acid, trans-[MF(NNCHCHCH2CO)(dppe)2]+ (11+; M = Mo, W) was formed as the kinetic product, which gradually isomerized to the thermodynamically more stable compound trans-[MF(NNCH2CHCHCO)(dppe)2]+ (12+). Both 11+ and 12+ (M = W) were crystallographically characterized, and the mechanism for the isomerization of 11+ to 12+ was proposed based on the results of the 1H NMR measurements." @default.
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• W2000794741 date "1997-01-01" @default.
• W2000794741 modified "2023-10-12" @default.
• W2000794741 title "Synthesis and Structure Determinations of Complexes Containing a Five-Membered Lactam Structure Based on Organohydrazido(2−) Ligands¹" @default.
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• W2000794741 doi "https://doi.org/10.1021/ic960778e" @default.
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