Metal Hydride vs SIDE-ON .sigma.-Bonded Trichlorosilane Complexes of Arene-Chromium Derivatives: (.eta.6-Arene)Cr(CO)(H)2(SiCl3)2

Reactions of Hydrosilanes with Transition-Metal Complexes: Formation of Stable Transition-Metal Silyl Compounds

“…The majority of the reported studies of reactions of silanes with metal complexes involve tertiary silanes and examples are illustrated in Table . − …”

Manganese Silyl Dihydride Complexes: A Spectroscopic, Crystallographic, and Computational Study of Nonclassical Silicate and Hydrosilane Hydride Isomers

“…Then, in 1990, the same group reported the first examples of transition metal (Re) complexes featuring multiple (four or two) hydride ligands interacting with a single silyl ligand (Figure a,b), though the hydride atoms were not crystallographically located . Five years later, Klabunde and Radonovich et al reported X-ray crystal structures for a pair of chromium disilyl dihydride complexes with short distances between one of the silyl ligands and two neighboring hydride ligands (1.75(7) and 1.60(6) Å for one, 1.66(4) and 1.87(4) Å for the other; Figure c), though the authors stopped short of stating that two Si–H interactions were present due to significant errors in the bond distances and potential involvement of the second silyl ligand in the bonding scheme . Then, in 1999, Sabo-Etienne et al reported a Ru complex featuring a silyl ligand with two adjacent hydride coligands (Figure d), with short Si–H distances of 1.72(3) and 1.83(3) Å determined by X-ray diffraction .…”

“…Then, in 1999, Sabo-Etienne et al reported a Ru complex featuring a silyl ligand with two adjacent hydride coligands (Figure d), with short Si–H distances of 1.72(3) and 1.83(3) Å determined by X-ray diffraction . Over the past two decades, approximately a dozen crystallographically characterized monometallic transition metal silyl dihydride complexes have been reported to feature interactions between a silyl ligand and two hydride ligands, and are often referred to as silicate (H 2 SiR 3 – ) complexes. ,,,,− These complexes highlight the potential for silicon hypervalency in transition metal complexes and are of interest as models in the heterolytic splitting of hydrosilanes on metal centers …”

“…Early examples of complexes reported to involve multiple Si–H interactions to the same silicon center. − …”

Synthesis, electrochemistry, and crystal and molecular structures of some molybdenum(0) arene derivatives with fluorinated and phenyl-substituted arene ligands

“…The C-C and C-F bond distances of the arene ligand are comparable to those observed in Cr(g 6 -C 6 H 5 F)(CO) 2 (SiCl 3 ) 2 [C-C, mean value, 1.388 and C-F bond distance, 1.334 (9) A] within the 1:1 co-crystallite Cr(g 6 -C 6 H 5 F)(CO) 2 (SiCl 3 ) 2 Á Cr(g 6 -C 6 H 5 F)(CO)(H) 2 -(SiCl 3 ) 2 [33], and in Cr(g 6 -C 6 H 5 F)(CO) 2 (SnPh 3 ) 2 [C-C mean value, 1.402 A and C-F bond distance, 1.32 (2) A] [34].…”