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Platinum Complexes with a Phosphino‐Oxime/Oximate Ligand
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2018-07-05 , DOI: 10.1002/ejic.201800398
Javier Francos 1 , Javier Borge 2 , Salvador Conejero 3 , Victorio Cadierno 1
Affiliation  

The platinum(II) complex [PtCl2(COD)] (2; COD = 1,5‐cyclooctadiene) reacted with 1 and 2 equiv. of 2‐(diphenylphosphanyl)benzaldehyde oxime (1) to generate [PtCl22‐(P,N)‐2‐Ph2PC6H4CH=NOH}] (3) and [Pt{κ2‐(P,N)‐2‐Ph2PC6H4CH=NOH}2][Cl]2 (4), respectively. Deprotonation of the oxime hydroxyl group of 3 with Na2CO3 led to the selective formation of the dinuclear species (µ‐O)‐[PtCl{κ2‐(P,N)‐2‐Ph2PC6H4CH=NO}]2 (5), while the related methylated derivative (µ‐O)‐[PtMe{κ2‐(P,N)‐2‐Ph2PC6H4CH=NO}]2 (7) could be obtained from the direct reaction of [PtMe2(COD)] (6) with the phosphino‐oxime ligand 1. In the case of 4, its treatment with Na2CO3 yielded complex [Pt({κ2‐(P,N)‐2‐Ph2PC6H4CH=NO}2H)][Cl] (8), as a result of the deprotonation of only one of the OH groups of 4. On the other hand, contrary to what was observed with 6, no deprotonation of the oxime occurred in the reaction of [PtMe3I]4 (9) with 1, from which the mononuclear PtIV derivative fac‐[PtIMe32‐(P,N)‐2‐Ph2PC6H4CH=NOH}] (10) was isolated. The solid‐state structures of compounds 3, 4, 7 and 10 were determined by X‐ray crystallography. In addition, the potential of all the synthesized complexes as catalysts for the dehydrogenative coupling of hydrosilanes with alcohols is also briefly discussed.

中文翻译:

含膦-肟/肟配体的铂配合物

铂(II)配合物[PtCl 2(COD)](2; COD = 1,5-环辛二烯)与1和2当量反应。2-(二苯基膦基)苯甲醛肟(的1),以产生[氯铂酸22 - (P,N)-2-PH 2 PC 6 H ^ 4 CH = NOH}](3)和[铂{κ 2 - (P,N)-2-Ph 2 PC 6 H 4 CH = NOH} 2 ] [Cl] 24)。Na 2 CO 33的肟羟基进行质子化导致双核物种(μ-O)的选择性形成- [{氯铂酸κ 2 - (P,N)-2-PH 2 PC 6 H ^ 4 CH = NO}] 25),而相关的甲基化衍生物(μ-O) - [{PTMEκ 2 - (P,N)-2-PH 2 PC 6 H ^ 4 CH = NO}] 27)可被从直接反应获得的[PTME 2(COD)] (6)与膦基肟配体1。在4的情况下,用Na 2 CO 3处理得到络合物[PT({κ 2 - (P,N)-2-PH 2 PC 6 H ^ 4 CH = NO} 2 H)] [CL](8),因为只有OH中的一个的去质子化的结果4人一组。在另一方面,相反与所观察到的6,无肟的去质子化发生在[PTME反应3 I] 49)与1,从该单核铂IV衍生物FAC - [PTIME 32 ‐(P,N)‐2‐Ph 2 PC 6分离出H 4 CH = NOH}](10)。化合物的固态结构34710,通过X射线晶体学确定。此外,还简要讨论了所有合成的配合物作为氢化硅烷与醇脱氢偶联的催化剂的潜力。
更新日期:2018-07-05
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