In 2022,Estrada, Alexander L.; Wang, Leyong; Bhuvanesh, Nattamai; Hampel, Frank; Gladysz, John A. published an article in Organometallics. The title of the article was 《Syntheses, Structures, Reactivities, and Dynamic Properties of Gyroscope-like Complexes Consisting of Rh(CO)(X) or Rh(CO)2(I) Rotators and Cage-like Trans Aliphatic Dibridgehead Diphosphine Stators》.Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium The author mentioned the following in the article:
Square planar (4c) was prepared from trans-Rh(CO)(Cl)[P((CH2)6CH:CH2)3]2 by a C:C metathesis/hydrogenation sequence (41%). Additions of NaBr, NaI, or KSCN give the substitution pseudohalide products (X = Br/I/-NCS, 5c/6c/7c, 97-44%). Additions of ZnPh2, MeLi, or NaBH4 give Ph, Me complexes (R = Ph/Me, 8c/9c, ∼94-89%) or hydride complex (10c, 99%). Reactions with BrCCl3 or CO give the octahedral or trigonal bipyramidal addition products (11c, 97%) or (12c, ∼98%). The crystal structures of 5c, 6c, 8c, and 10c are determined These and other data were used to calculate the dimensions of the rotators and void spaces of the diphosphine cages, aiding the interpretation of dynamic properties. Specifically, 4c-6c and 9c-10c exhibit a single set of seven CH213C NMR signals at room temperature, although three sets of seven are expected from symmetry (facile 360° Rh(CO)(X) rotation); 7c-8c exhibit two sets of seven signals with a ∼ 2:1 area ratio (∼90° Rh(CO)(X) rotation); 11c exhibits three sets of seven signals (no Rh(CO)(Cl)(Br)(CCl3) rotation). The barrier to Rh(CO)2(I) rotation in 12c is bounded as higher than that of Rh(CO)(I) rotation in 6c, but the rotamers preferentially interconvert via CO dissociation/addition Reaction of 4c and excess PMe3 gives trans-Rh(CO)(Cl)(PMe3)2 (72%) and the dibridgehead diphosphine P((CH2)14)3P (58%). The latter reacts with [(OC)2Rh(μ-Cl)]2 to regenerate 4c (58%). In the experiment, the researchers used many compounds, for example, Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium)
Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9) is a ruthenium-based olefin metathesis catalyst. It is useful for olefin cross metathesis (CM) and ring closing metathesis (RCM) of terminal olefins under a variety of reactions conditions, and so on.Safety of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics