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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and characterisation of light lanthanide bis-phospholyl borohydride complexes
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Synthesis and characterisation of light lanthanide bis-phospholyl borohydride complexes

机译:光镧双磷酸硼氢化物复合物的合成与表征

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Organometallic lanthanide (Ln) chemistry is dominated by complexes that contain substituted cyclopentadienyl (Cp-R) ligands. Closely related phospholyls have received less attention, and although they have proven utility in stabilising low oxidation state Ln complexes the trivalent Ln chemistry of these ligands is limited in comparison. Herein, we synthesise two families of heteroleptic Ln(3+). complexes, [Ln(Htp)(2)(mu-BH4)](2) (Htp = 2,5-di-tert-butylphospholyl; 1-Ln; Ln = La, Ce, Nd, Sm), and [Ln(Htp)(2)(mu-BH4)(2)K(S)](n )(2-Ln, Ln = La, Ce, S = 2 DME, n = 2; 3-Ce, Ln = Ce, S = Et2O and THF, n = infinity) via the reactions of parent [Ln (BH4)(3)(THF)(3.5)] with K(Htp), to investigate differences between Ln complexes with substituted phospholyl ligands and analogous Cp-R complexes. Complexes 1-3-Ln were characterised as appropriate by single crystal XRD, SQUID magnetometry, elemental analysis, multinuclear NMR, ATR-IR and UV-Vis-NIR spectroscopy. Ab initio calculations reveal that small changes in the Ln(3+) coordination spheres of these complexes can have relatively large influences on crystal field splitting.
机译:有机金属镧系元素(LN)化学由含有取代的环戊二烯基(CP-R)配体的复合物支配。密切相关的磷酸酯的注意力不太注意,尽管它们在稳定低氧化态Ln复合物中具有验证的效用,但这些配体的三价LN化学物质的有限量是有限的。在此,我们合成两个异质LN(3+)的家族。复合物,[LN(HTP)(2)(2)(MU-BH4)](2)(HTP = 2,5-二叔丁基膦酰基; 1-LN; LN = LA,CE,ND,SM)和[LN (HTP)(2)(2)(MU-BH4)(2)k(2)k(N)(2-Ln,Ln = La,Ce,S = 2 DME,n = 2; 3-Ce,Ln = Ce, S = Et 2 O和THF,N =无穷大)通过K(HTP)的亲本[LN(BH4)(3)(3)(3)(3)(3)(3))(3)(3)]反应,以研究LN复合物与取代的磷光酯配体和类似CP-的差异r复合物。通过单晶XRD,鱿鱼磁体,元素分析,多核NMR,ATR-IR和UV-Vis-nir光谱,表征复合物1-3-LN的特征。 AB Initio计算表明,这些复合物的LN(3+)协调球体的小变化可能对晶场分裂的影响相对较大。

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