Peculiarities of the reaction of (SPY-5-34)-dichloro-(κ2(C,O)-2-formylbenzylidene)(1,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene)ruthenium with potassium hydridotris(pyrazolyl)borate

A Boron‐Fluorinated Tris(pyrazolyl)borate Ligand (FTp*) and Its Mono‐ and Dinuclear Copper Complexes [Cu(FTp*)2] and [Cu2(FTp*)2]: Synthesis, Structures, and DFT Calculations

“…Data for 3 (CCDC 1436347): Empirical formula:C 30 H 42 B 2 N 12 F 2 Cu 2 , crystal system:m onoclinic, space group: P2 1 /n, a = 1111.42(7) pm, b = 1134.03 (7) pm, c = 1318.08(8) pm, b = 90.278(1)8, V = 1661.3(2) 10 6 pm 3 , Z = 2, m = 1.334 mm À1 , 1 calcd = 1.514 gcm À3 ,c rystal dimensions (ca. ): 0.66 0.52 0.48 mm 3 ,1 00 K, 2q max = 56.008;1 6351 reflections, 4001 independent, R int = 0.0159, 223 parameters, 0r estraints, R1 = 0.0240 (I > 2s)a nd wR2( all data) = 0.0663, max/min residual electron density:0.381/À0.282 10 À6 pm À3 .…”

“…Many Tp derivatives have been synthesised ever since, primarily focussing on the introduction of functional groups on the pyrazolyl moieties . Although much less common, modifications of the substituents on boron have been reported in recent years, most notably by the groups of Slugovc, Gunnou and Esteruelas for functionalised Tp's (Scheme ) and Messerle and Hill for related bis(pyrazolyl)borate derivatives.…”

“…Although boron‐chlorination has been observed within poly(pyrazolyl)borate chemistry, to our knowledge, complexes 3 and 4 are the first examples of cleanly isolated and fully characterised tris(pyrazolyl)borate complexes with B−F bonds. Unlike previously reported examples of B−H substitution reactions in the parent Tp system, the title compounds containing the fluorinated F Tp* ligand have been obtained from tetrakis(3,5‐dimethylpyrazolyl)silane, [Si(3,5‐Me 2 pz) 4 ] ( 1 ), and [Cu(MeCN) 4 ][BF 4 ] ( 2 ). The former acts as a pyrazolyl transfer reagent, whereas the [BF 4 ] − counter anion of the copper(I) precursor serves as the source of the {BF} entity.…”

cis-Dichlorido(1,3-dimesitylimidazolidin-2-ylidene)(2-formylbenzylidene-κ2C,O)ruthenium diethyl ether solvate

“…This feature is used to design latent ROMP initiators and catalysts for e.g. ring closing metathesis at elevated temperatures (Szadkowska & Grela, 2008;Burtscher et al, 2006;Vougioukalakis & Grubbs, 2010).…”

Formation of Oxaphosphacarbenes by Reaction of [RuTpCl(PPh3)(thp)] with Terminal Alkynes and a Propargylic Alcohol

“…The three Ru-N(Tp) bond lengths span from 2.052(14) Å (trans to the chlorido ligand) to 2.204(12) Å (trans to the carbene carbon atom, which reflects its strong trans influence) and are similar to those found in other TpRu carbene complexes. [16] The Ru-P bond length 2.226(4) Å is shorter than that found in other ruthenium complexes with the thp ligand, [10c] and the Ru-C bond length 1.92(2) Å is similar to those found in other TpRuClP carbene complexes. [17] The supramolecular structure contains one H bond between one of the hydroxy groups of the ligand and the chlorine atom of a neighbouring molecule, which results in a zig-zag chain along the b axis.…”