Glutaryl and adipoyl chlorides undergo facile condensation with the bis(silyl)phosphanes RP(SiMe3)2 (R = Me, nBu, tBu, Ph, Mes) to afford exclusively the phosphacycloalkyldiones (CH2)n(C[double bond, length as m-dash]O)2PR (n = 3, 4). Characterised spectroscopically and, for R = Ph, Mes (n = 3) crystallographically, the macrocycles are conformationally fluxional in solution and appreciably moisture sensitive. Though seemingly resistant to chemical oxidation at phosphorus, coordination is readily achieved, as illustrated by isolation of trans-[Pt(PEt3){P(Ph)(CO)2(CH2)3}Cl2] and a series of tungsten pentacarbonyl complexes, which are characterised crystallographically and by infrared and NMR spectroscopy. Together, these data suggest the macrocycles to be relatively weak σ-donors with no appreciable π-acceptor character.

中文翻译：

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磷环烷基二酮：6和7员环二酮膦基的合成和配位行为。

戊二酰氯和己二酰氯与双（甲硅烷基）膦RP（SiMe3）2（R = Me，nBu，tBu，Ph，Mes）容易缩合，仅得到磷环烷基二酮（CH2）n（C [双键，长度为m -破] O）2 PR（n ＝ 3、4）。在光谱上表征，对于R = Ph，在结晶学上为Mes（n = 3）表征，大环在溶液中呈构象流动，并且对水分敏感。尽管看似对磷的化学氧化具有抗性，但很容易实现配位，如反式-[Pt（PEt3）{P（Ph）（CO）2（CH2）3} Cl2]和一系列五羰基钨配合物的分离所示，通过结晶学，红外光谱和NMR光谱对其进行表征。这些数据共同表明，大环是相对弱的σ供体，没有明显的π受体特征。