31168-85-1Relevant academic research and scientific papers
Synthesis and molecular structures of tris(thio- and selenophenyl)stannyl complexes of cyclopentadienylcarbonylnitrosylmanganese and their reaction products with tungsten carbony
Pasynskii,Blokhin,Torubaev,Dobrokhotova, Zh. V.
, p. 879 - 886 (2012/03/13)
Reactions of CpMn(CO)(NO)SnCl3 (I) with sodium benzenethiolate and sodium benzenesele-nolate gave orange crystals of the complexes CpMn(CO)(NO)Sn(EPh)3, where E = S (II) or Se (III). Treatment of complex II with photochemically generated W(CO)5(THF) yielded the adduct CpMn(CO)(NO)Sn(SPh)3 ? W(CO)5 (IV). A similar treatment of complex III resulted in the formation of the ditungsten complex W2(CO)4(SePh)6 (V) with transfer of all chalcogenate groups from tin to tungsten. In reactions of complexes II and III with a Pt0 complex with phosphine and acetylene, (PPh 3)2Pt(Ph2C2), the chalcogenate groups are transferred from tin. Only the known Pt(II) complexes (PPh 3)2Pt(EPh)2), where E= S (VI) or Se (VII). Molecular structures IV and V were characterized by X-ray diffraction. It has been found that the Mn-Sn bond in complex IV (2.5479(9) A) is nearly the same length as that found earlier for complex II (2.5328(17) A) and is substantially shorter than the sum of the covalent radii of Mn and Sn (2.78 A). The Sn-S bond is noticeably lengthened (2.5217(11) A) only for the S atom bound to tungsten (W-S, 2.5696(12) A), while the other Sn-S bonds (2.4413(12) and 2.4291(12) A) are virtually the same as in complex II (on average, 2.441 A). Complex V contains the direct W-W bond (2.8153(16) A) supplemented with four benzeneselenolate bridges in which the W-Se bonds (on average, 2.642(2) A) are longer than the two terminal W-SePh bonds (2.571(2) A). All the W-Se bonds are much shorter than the sum of the covalent radii of W and Se (2.82 A).
cis-to-trans isomerization promoted by pyridine as a crucial step for the selective preparation of trans-Pt(SAr)(CI)(PAr′3)2
Yamashita, Fumikazu,Kuniyasu, Hitoshi,Terao, Jun,Kambe, Nobuaki
, p. 1399 - 1404 (2008/10/09)
The general strategy for the syntheses of trans-Pt(SAr)(CI) (PAr′3)2 (1) (Ar = Ph, C6H 4-2-Me, C6H4-3-OMe C6H 4-2-F, etc.; Ar′ = Ph, C6H4-4-OMe, C 6H4-4-Me, and C6H4-4-CF3) by the reaction of cis-PtCl2(PAr′3)2 with ArSH has been developed. The mechanistic investigation suggested that isomerization of cis-1 into trans-1 promoted by the combined use of C 6H6 as a solvent and pyridine as a base was the key to the successful preparation of 1.
