Synthesis of the η²‐1‐Phosphaallene Complexes [(η⁵‐C₅H₅)(CO)(NO)W{η²‐R¹P=C=C(R²)H}] (R¹ = tBu, Cy; R² = Ph, H) from [(η⁵‐C₅H₅)(CO)(NO)W=C=C(R²)H] (R² = Ph, H) and Inversely Polarized Phosphaalkenes R¹P=C(NMe₂)₂ (R¹ = tBu, Cy), and Their Structure

Abstract

The reaction of the vinylidene complex [(η5‐C5H5)(CO)(NO)W=C=C(H)Ph] (9) with the phosphaalkenes RP=C(NMe2)2 (1a: R = tBu; 1c: R = c‐C6H11) affords the novel η2‐1‐phosphaallene complexes [η2‐{RP=C=C(H)Ph}W(CO)(NO)(η5‐C5H5)] (14: R = tBu; 15: R = c‐C6H11) in addition to the carbene complex [(η5‐C5H5)(CO)(NO)W=C(NMe2)C(Ph)=C(H)NMe2] (16). Similarly, treatment of [(η5‐C5H5)(CO)(NO)W=C=CH2] (12) with the phosphaalkenes gives rise to the formation of [η2‐{RP=C=CH2}W(CO)(NO)(η5‐C5H5)] (17: R = tBu; 18: R = c‐C6H11). The novel compounds 14, 15, 17, and 18 were characterized by elemental analysis and by spectroscopy (IR, 1H, 13C NMR, MS). Moreover, the molecular structures of 14 and 16 were determined by X‐ray diffraction analyses. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

Full one-loop QCD and electroweak corrections to sfermion pair production inγγcollisions

“…Then from Eq. (2.17) we get the counter-term of the electric charge in DR scheme expressed as [33,34,13]…”

Phospha‐ and Arsaalkenes RE=C(NMe2)2 (E = P, As) as Novel Phosphinidene‐ and Arsinidene‐Transfer Reagents

“…[78] The generation of carbene complex 123 was previously observed in the reaction of 120 with phosphaalkenes RP=C(NMe 2 ) 2 82 (a: R = tBu; b: Cy). [68] …”

“…Treatment of [Cp(CO)(NO)W=C=C(H)Ph] (120) with half a molar equivalent of phosphaalkenes RP=C(NMe 2 ) 2 82 (a: R = tBu; b: c-C 6 H 11 ) in ethereal solvents at 0°C to 20°C afforded the crystalline η 2 -1-phosphaallene complexes 121 (20 % yield) and 122 (19 %) after chromatography [68] (Scheme 51). Red crystalline carbene complex 123 was formed as a byproduct in these reactions.…”