02261nas a2200241   4500008004100000022001400041245011100055210007000166260000900236490000700245520143100252653001901683653002501702653001501727653002001742653000901762100001901771700001801790700002101808700001701829700002301846856015001869       2025                        eng d  a0947-653900aPair of dinuclear Fe(II) enantiomers: syntheses and structures of ΛΔ/ΔΛ-Bis(Dihydridoborate) complexes0 aPair of dinuclear FeII enantiomers syntheses and structures of Λ  cFEB 0 v313 a<p>
	In our effort to establish a direct synthetic approach for bis(dihydridoborate) complexes of first-row transition metals, we have investigated the reactivity of [Cp*Fe(dppe)Cl] (dppe =1,2-bis(diphenylphosphino)ethane) with Na[BH3L] (L =2-mercaptopyridine (mp) and 2-mercaptobenzothiazole (mbz)) that led to the formation of iron(II) dihydridoborate complexes, [Cp*Fe{kappa 3-S,H,H-(H2BH(L))}] 1 a-b (L=mp (1 a) and L=mbz (1 b)). Further, in an attempt to isolate the bis(dihydridoborate) complex of iron by the insertion of borane into the kappa 2-N,S-chelated iron complex, [(dppe)Fe{kappa 2-N,S-(mp)}2] (2), we have isolated and structurally characterized a rare example of dimeric iron bis(dihydridoborate) complex, [Fe{kappa 3-S,H,H-(H2BH(mp))}2]2, Lambda Delta/Delta Lambda-3 as pair of enantiomers. Interestingly, these enantiomers Lambda Delta/Delta Lambda-3 have two trans-[Fe{kappa 3-S,H,H-(H2BH(mp))}2] moieties bridged through sulfur atoms of 2-mercaptopyridinyl ligands, where the iron centres are hepta-coordinated. The natural bond-orbital (NBO) analyses of Lambda Delta-3 and Delta Lambda-3 show considerable electron donation from the filled sigma B-H bonding orbital to vacant dz2 \${{d}_{{z}&lt;\^&gt;{2}}}\$ orbital of iron with a substantial contribution from the hydrogen atoms. The localized orbital bonding analysis (LOBA) method suggests that all the iron centres are in +2 oxidation state.</p>
10aB-H activation10aBis(dihydridoborate)10aEnantiomer10aHeptacoordinate10airon1 aKaur, Urminder1 aGayen, Sourav1 aSharma, Himanshu1 aVanka, Kumar1 aGhosh, Sundargopal  uhttps://library.ncl.res.in/content/pair-dinuclear-feii-enantiomers-syntheses-and-structures-%CE%BB%CE%B4%CE%B4%CE%BB-bisdihydridoborate-complexes