Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W)

Weber L, Bayer P, Uthmann S, Braun T, Stammler H-G, Neumann B (2006)
European Journal of Inorganic Chemistry 2006(1): 137-143.

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Abstract
The reaction of the phosphavinylidene complexes [CP(CO)(2)M=P=C(SiMe3)(2)] [CP = C5H5, M = Mo (2), W (3)] with the ferrioaarsaalkene [Cp*(CO)(2)Fe-As=C(NMe2)(2)] (1a) (Cp* = C5Me5) afforded the novel eta(3)-2-phospha-1-arsaallyl complexes [eta(3)-([Fe]-As-P-C(SiMe3)(2))M(CO)(2)CO)(2)Cp] {M = Mo, [Fe] = [CP*(CO)(2)Fe] (4a);W (5a)). Similarly, treatment of equimolar amounts of 3 with arsaalkene tBu-C(O)-As=C(NMe2)(2) (1b) gave rise to the formation of {eta(3)-{tBuC(O)-As-P-C(SiMe3)(2)}W(CO)(2)Cp] (5b) by an arsinidene transfer process. In contrast to this, the more reactive arsaalkene 4-Et-C6H4C(O)-As=C(NMe2)(2) (1c) and complex 3 underwent reaction to give the cyclic phosphenium complex [CP(CO)(2)W=P-O-C-a(4-EtC6H4)=As-C-b (SiMe3)(2)(P-C-b)] (6). The novel compounds 4a, 5a, 5b, and 6 were characterized by elemental analyses and by means of spectroscopy (IR, H-1, C-13, P-31 NMR). Moreover, the molecular structures of 4a, 5b, and 6 were elucidated by X-ray diffraction analyses. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).
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Weber L, Bayer P, Uthmann S, Braun T, Stammler H-G, Neumann B. Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W). European Journal of Inorganic Chemistry. 2006;2006(1):137-143.
Weber, L., Bayer, P., Uthmann, S., Braun, T., Stammler, H. - G., & Neumann, B. (2006). Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W). European Journal of Inorganic Chemistry, 2006(1), 137-143.
Weber, L., Bayer, P., Uthmann, S., Braun, T., Stammler, H. - G., and Neumann, B. (2006). Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W). European Journal of Inorganic Chemistry 2006, 137-143.
Weber, L., et al., 2006. Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W). European Journal of Inorganic Chemistry, 2006(1), p 137-143.
L. Weber, et al., “Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W)”, European Journal of Inorganic Chemistry, vol. 2006, 2006, pp. 137-143.
Weber, L., Bayer, P., Uthmann, S., Braun, T., Stammler, H.-G., Neumann, B.: Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W). European Journal of Inorganic Chemistry. 2006, 137-143 (2006).
Weber, Lothar, Bayer, Philipp, Uthmann, Stefan, Braun, Thomas, Stammler, Hans-Georg, and Neumann, Beate. “Reactivity of the Inversely Polarized Arsaalkenes R–As=C(NMe2)2 {R = [η5-C5Me5)(CO)2Fe], tBuC(O), 4-EtC6H4C(O)} towards Phosphavinylidene Complexes [η5-(C5H5)(CO)2M=P=C(SiMe3)2] (M = Mo, W)”. European Journal of Inorganic Chemistry 2006.1 (2006): 137-143.
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