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- W2023196306 abstract "Treatment of tetrahydrofuran (thf) solutions of [[graphic omitted])Cl2]1b with ButOH, LiOBut or NaOSiPh3 affords in small yields the spirocyclic vanadyl complex [[graphic omitted])2O]2. This complex is formed in nearly quantitative yield from [VOCl2(thf)2] and Na[OPPh2NPPh2O]. It crystallizes in the monoclinic space group P21/c with a= 1572.0(8), b= 1056.3(5), c= 2685.0(13) pm, β= 94.30(2)° and Z= 4. The structure was refined to R= 0.033, R′= 0.044. The nitrogen atoms in 1b adjacent to the metal have been replaced by oxygen atoms during alcoholysis. The V atom has a square-pyramidal geometry. The d1 electronic state was confirmed by ESR measurements. Reaction of MoOCl4 and [H2NPPh2NPPh2NH2]Cl yields the already known [[graphic omitted])Cl3]1a and the spirocyclic molybdenum compound [[graphic omitted])2Cl2]3. The 1 : 1 MeCN adduct of 3 crystallizes in the acentric space group P1 with a= 1087.1(5), b= 1156.4(6), c= 1166.5(6) pm, α= 82.86(2), β= 68.26(2), γ= 64.15(2)° and Z= 1. The Mo atom has a distorted-octahedral geometry with short Mo–N bond lengths (average 177.8 pm)." @default.
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- W2023196306 date "1991-01-01" @default.
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- W2023196306 title "Formation of spirocyclic imidophosphinato complexes: crystal structures of [V(OPPh2NPPh2O)2O] and [Mo(NPPh2NPPh2O)2Cl2]" @default.
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- W2023196306 doi "https://doi.org/10.1039/dt9910001285" @default.
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