Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W)

Weber L, Noveski G, Uthmann S, Stammler H-G, Neumann B (2007)
European Journal of Inorganic Chemistry (25): 4011-4016.

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Abstract
Reaction Of [CP(CO)(2)M = PPh2] [where M = Mo (2a), W (2b)] with an excess of the phosphaalkenes arylC(O)P=C(NMe2)(2) [where aryl = Ph (3), 4-EtC6H4 (5)] afforded the metallophosphaalkenes [CP(CO)(2)M-a-P=C(aryl)-O-(PPh2)-Ph-b (M-a-P-b)] [where M = Mo, aryl = Ph (4a); M = W, aryl = Ph (4b); M = MO, aryl = 4-EtC6H4 (6a); M = W, aryl = 4-EtC6H4 (6b)] as orange crystals. Compounds 4a,b and 6a,b were characterized by means of spectroscopy (IR, H-1, C-13 and P-31 NMR spectroscopy and MS). Moreover, the molecular structures of 3, 4a, and 6b were determined by X-ray diffraction analysis.
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Weber L, Noveski G, Uthmann S, Stammler H-G, Neumann B. Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W). European Journal of Inorganic Chemistry. 2007;(25):4011-4016.
Weber, L., Noveski, G., Uthmann, S., Stammler, H. - G., & Neumann, B. (2007). Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W). European Journal of Inorganic Chemistry(25), 4011-4016.
Weber, L., Noveski, G., Uthmann, S., Stammler, H. - G., and Neumann, B. (2007). Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W). European Journal of Inorganic Chemistry, 4011-4016.
Weber, L., et al., 2007. Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W). European Journal of Inorganic Chemistry, (25), p 4011-4016.
L. Weber, et al., “Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W)”, European Journal of Inorganic Chemistry, 2007, pp. 4011-4016.
Weber, L., Noveski, G., Uthmann, S., Stammler, H.-G., Neumann, B.: Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W). European Journal of Inorganic Chemistry. 4011-4016 (2007).
Weber, Lothar, Noveski, Gabriel, Uthmann, Stefan, Stammler, Hans-Georg, and Neumann, Beate. “Phosphaalkenes R1C(O)–P=C(NMe2)2 (R1=Ph, 4-EtC6H4): Versatile Reagents for 1,3-Dipolar Cycloadditions to Phosphenium Complexes [Cp(CO)2M = PPh2] (M = Mo, W)”. European Journal of Inorganic Chemistry 25 (2007): 4011-4016.
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