Über den Phosphandiyl-Transfer von invers-polarisierten Phosphaalkenen R1P=C(NMe2)2 (R1 =tBu, Cy, Ph, H) auf Phospheniumkomplexe [(η5-C5H5)(CO)2M=P(R2)R3] (R2 = R3 = Ph; R2 =tBu, R3 = H; R2 = Ph, R3 = N(SiMe3)2)
作者:L. Weber、G. Noveski、H.-G. Stammler、B. Neumann
DOI:10.1002/zaac.200700034
日期:2007.6
[(eta(5)-C5H5)(Co)(2)W=PPh2] (3) with the inversely polarized phosphaalkenes RP=C(NMe2)(2) (1) (a: R = tBu; b: Cy; c: Ph) led to the eta(2)-diphosphanyl complexes [(eta(5)-C5H5)(CO)(2)W-P(R)-PPh2] (9a-c) which were isolated by column chromatography as yellow crystals in 24-30 % yield. Similarly, phosphenium complexes [(eta(5)-C5H5)(Co)(2)M=P(H)tBu] (M = W (6); Mo (8)) were converted into [(eta(5)-C5H5)(CO)(2)MP(t-B-u)P(H)tBu]
新制备的鏻钨络合物 [(eta (5) -C5H5) (Co) (2) W = PPh2] (3) 与反向极化的磷烯烃 RP = C (NMe2) (2) (1) (a: R = tBu;b:Cy;c:Ph) 导致 eta (2) -二膦酰基复合物 [(eta (5) -C5H5) (CO) (2) WP (R) -PPh2] (9a-c)通过柱色谱分离为黄色晶体,产率为 24-30%。类似地,鏻配合物 [(eta (5) -C5H5) (Co) (2) M = P (H) tBu] (M = W (6); Mo (8)) 被转化为 [(eta (5) - C5H5) (CO) (2) MP (tBu) P (H) tBu] (M = W (11); Mo (12)) 通过从 1a 中正式提取膦二基 [PtBu]。[(eta (5) -C5H5) (CO) (2) W = P (Ph) N
Reactivity of the Inversely Polarized Phosphaalkene HPC(NMe<sub>2</sub>)<sub>2</sub> Toward Carbene Tungsten Complexes [(CO)<sub>5</sub>WC(R<sup>1</sup>)OR<sup>2</sup>] (R<sup>1</sup> = <i>c</i>-C<sub>3</sub>H<sub>5</sub>, <i>c</i>-C<sub>5</sub>H<sub>9</sub>; R<sup>2</sup> = Me, Et, Me<sub>3</sub>Si): A Novel Access to η<sup>1</sup>-Phosphaalkene Complexes [(CO)<sub>5</sub>W−P(R<sup>2</sup>)C(H)NMe<sub>2</sub>]
Reaction of equimolar amounts of the phosphaalkene HPC(NMe2)2 (6c) and carbene complex [(CO)5WC(OSiMe3)(c-C3H5)] (11a) in n-pentane afforded the novel phosphaalkene complex [(CO)5W-κ-PMe3SiPC(H)NMe2}] (12). Under comparable conditions carbene complexes [(CO)5WC(OR)(c-C3H5)] (11b, R = Me; 11c, R = Et) were converted by the phosphaalkene to dinuclear 1,3-diphosphetane complexes (13b,c). In contrast
等摩尔量的磷烯烃HP C(NMe 2)2(6c)和卡宾络合物[(CO)5 W C(OSiMe 3)(c -C 3 H 5)](11a)在正戊烷中的反应提供了新的复杂磷杂烯[(CO)5 W-κ- P 我3的SiP C(H)NME 2 }](12)。在可比条件下,卡宾络合物[(CO)5 W C(OR)(c -C 3 H 5)](11b,R =我; 在图11c中,R = Et)被磷烯烃转化为双核1,3-二磷杂环戊烷络合物(13b,c)。与此相反,用XP C(NMe 2)2(X = H,D)处理[(CO)5 W C(OEt)(c -C 5 H 9)](11d)导致形成PH官能化的1,3-二磷杂环丁烷的双(五羰基钨)络合物(14)。通过元素分析,IR和1 H,13 C和31表征了新产品1 H NMR谱。此外,分子结构12,图13C,和14是由X射线结构分析阐明。
Synthesis and Structure of the First η
<sup>3</sup>
‐1,2‐Diphosphaallyl Complexes [(η
<sup>5</sup>
‐C
<sub>5</sub>
H
<sub>5</sub>
)(CO)
<sub>2</sub>
M{η
<sup>3</sup>
‐RPPC(SiMe
<sub>3</sub>
)
<sub>2</sub>
}] (M = Mo, R =
<i>t</i>
Bu, Cy; M = W, R =
<i>t</i>
Bu) from [(η
<sup>5</sup>
‐C
<sub>5</sub>
H
<sub>5</sub>
)(CO)
<sub>2</sub>
M=P=C(SiMe
<sub>3</sub>
)
<sub>2</sub>
] (M = Mo, W) and Inversely Polarized Phosphaalkenes RP=C(NMe
<sub>2</sub>
)
<sub>2</sub>
(R =
<i>t</i>
Bu, Cy)
Reaction of [(eta(5)-C5H5)(CO)(2)M=P=C(SiMe3)(2)] [where M = Mo (2), W (5)] with the phosphaalkene tBuP=C(NMe2)(2) (1a) afforded the eta(3)-1,2-diphosphaallyl complexes [(eta(5)-C5H5)-(CO)(2)M(eta(3)-tBuPPC(SiMe3)(2)}], [where M = Mo (3a); M = W (6)]. Similarly, 2 and CyP=C(NMe2)(2) (1b; where Cy = cyclohexyl) gave rise to the formation of [(eta(5)-C5H5)(CO)(2)Mo-CyPPC(SiMe3)(2))] (3b) by a phosphinidene
[(eta(5)-C5H5)(CO)(2)M=P=C(SiMe3)(2)] [其中 M = Mo (2), W (5)] 与磷烯烃 tBuP=C( NMe2)(2) (1a) 得到 eta(3)-1,2-二磷烯丙基复合物 [(eta(5)-C5H5)-(CO)(2)M(eta(3)-tBuPPC(SiMe3)(2) )}], [其中 M = Mo (3a); M = W (6)]. 类似地,2 和 CyP=C(NMe2)(2) (1b; 其中 Cy = 环己基) 导致 [( eta(5)-C5H5)(CO)(2)Mo-CyPPC(SiMe3)(2))] (3b) 通过膦转移过程。少量 [eta(5) -C5H5)(CO)(2)Mo}(2)(eta(2):eta(2) -Cy3P5)] (4) 作为次要产物形成。然而,用 HP=C(NMe2)(2) (1c) 处理 2 和 5 产生了复合物
Povolotskii, M. I.; Negrebetskii, V. V.; Romanenko, V. D., Journal of general chemistry of the USSR, 1990, vol. 60, # 10.1, p. 2000 - 2005
作者:Povolotskii, M. I.、Negrebetskii, V. V.、Romanenko, V. D.、Ivanchenko, V. I.、Sarina, T. V.、Markovskii, L. N.