Crystal and molecular structure of A 1?2 complex of tris(tetrahydroborato)yttrium with tetrahydrofuran

Structural diversity in the borohydrido lanthanides series: First isolation and X-ray crystal structure of ionic

“…A similar structure was published for a yttrium borohydride, ½YðBH 4 Þ 2 ðTHFÞ 4 þ ½YðBH 4 Þ 3 À where the Y atom is in a formal tetrahedral coordination (anion) with four BH 4 groups or in octahedral coordination (cation) with two BH 4 and four THF ligands [11]. Because of the smaller size of the yttrium atom than that of samarium, there are only four THF molecules in the coordination sphere of Y atom in the cation.…”

Syntheses of lanthanide monochloride and monoborohydride complexes supported by bridged bis(guanidinate) ligand and the use of borohydride complexes in polymerization of cyclic esters

“…À group [44,45]. This may be related to the more steric demanding of the yttrium coordination sphere in 8.…”

Synthesis and Structure of a Dimeric Yttrium Complex [LSi(BH3)(C5Me4)Y(CH2SiMe3)2]2 (L = PhC(NtBu)2) and Its Catalytic Application for Hydroboration of Ketones and Aldehydes

“…The Y–C (to C 5 Me 4 ring) distances are very close to each other (2.69–2.72 Å), consistent with the η 5 -coordination mode of the Cp ring. The Y···B distance of 2.594(2) Å is slightly longer than the values observed for Y­(BH 4 ) 3 (THF) 3 (2.58(1) Å) and [Y­(BH 4 ) 2 (thf) 4 ] + [Y­(BH 4 ) 4 ] − (avg 2.52 Å). , The Y–B–Si angle of 172.73(12)° is close to linear with the Si–B bond length of 1.982(2) Å, which is slightly longer than those observed in the amidinato silylene–borane complex (1.962–1.972 Å) …”

“…The structure of 3 (Figure 1) ) 4 ] − (avg 2.52 Å). 14,15 The Y−B−Si angle of 172.73(12)°is close to linear with the Si−B bond length of 1.982(2) Å, which is slightly longer than those observed in the amidinato silylene−borane complex (1.962− 1.972 Å). 9 RE complexes have been successfully employed as catalysts for catalytic hydroelementation of unsaturated organic compounds.…”

“…It was filtered, and the filtrate was concentrated to ca. 15 ,72.42;H,10.04;N,7.34. Found C,72.68;H,9.86;N,7.56 Synthesis of [PhC(NtBu) 2 Si(CpMe 4 )(BH 3 )Y(CH 2 SiMe 3 ) 2 ] 2 (3).…”