FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1975042012> ?p ?o ?g. }

• W1975042012 endingPage "3289" @default.
• W1975042012 startingPage "3279" @default.
• W1975042012 abstract "The synthesis of a series of group 4 metal complexes supported by the boroxide anion, [OB(mes)2]-, is described and their application in -olefin polymerization discussed. The compounds M{OB(mes)2}2Cl2(THF)2 [1, M = Ti; 2, M = Zr; 3, M = Hf] have been synthesized from MCl4(THF)n [M = Ti, n = 0; M = Zr/Hf, n = 2] and 2 equiv of lithiated dimesitylborinic acid. Accidental hydrolysis during the preparation of the zirconium analogue afforded the dimeric hydroxyl species [Zr{OB(mes)2}3(-OH)]2 (4), which was characterized crystallographically. The four-coordinate titanium bis(amide) complex, Ti{OB(mes)2}2(NEt2)2 (5), was prepared by protonolysis of the titanium-tetra(amide) using the parent borinic acid. X-ray structural analyses of 1 and 3 showed distorted, octahedral geometry at the metal with cis-boroxide and trans-chloride ligands. A series of mixed-ligand cyclopentadienyl/boroxide chlorides of the group 4 metals are also described. TiCp'{OB(mes)2}Cl2 (Cp' = -C5Me4H, 6) and MCp2{OB(mes)2}Cl [7, M = Ti; 8, M = Zr] are formed upon replacement of a chloride with a boroxide ligand using the appropriate TiCp'Cl3 and MCp2Cl2 starting materials. X-ray diffraction studies showed compounds 6 and 7 exist as monomers in the solid state, with distorted tetrahedral geometry around the metal. Selected complexes were tested for ethylene polymerization activity, using MAO as activator. Polymerization behavior was observed similar to that of ZrCp2Cl2 tested under the same conditions, which, supplemented by complementary reactivity studies and polymer analysis, suggests possible transfer of the boroxide ligand to aluminum during polymerization. To circumvent the problems associated with activation using MAO, a family of group 4 alkyl compounds have been synthesized. The titanium and hafnium compounds M{OB(mes)2}n(CH2Ph)4-n [9, M = Ti, n = 2; 10, M = Ti, n = 3; 11, M = Hf, n = 3; 12, M = Hf, n = 4] were synthesized by protonolysis of the tetra(benzyl) compounds. NMR studies of the reaction between 9 and B(C6F5)3 demonstrated that a well-defined cationic titanium compound was generated in solution; however, strong interaction with the anion prevented the system from being active for polymerization." @default.
• W1975042012 created "2016-06-24" @default.
• W1975042012 creator A5000195518 @default.
• W1975042012 creator A5035645976 @default.
• W1975042012 creator A5035918478 @default.
• W1975042012 date "2005-05-18" @default.
• W1975042012 modified "2023-09-24" @default.
• W1975042012 title "Boroxide Complexes of the Group 4 Metals: A “Noninnocent” Ligand in Olefin Polymerization" @default.
• W1975042012 cites W1514877293 @default.
• W1975042012 cites W1963779283 @default.
• W1975042012 cites W1972398460 @default.
• W1975042012 cites W1973124843 @default.
• W1975042012 cites W1975602792 @default.
• W1975042012 cites W1983031452 @default.
• W1975042012 cites W1993483674 @default.
• W1975042012 cites W1995995790 @default.
• W1975042012 cites W2001566554 @default.
• W1975042012 cites W2002720499 @default.
• W1975042012 cites W2003159533 @default.
• W1975042012 cites W2011223821 @default.
• W1975042012 cites W2011964070 @default.
• W1975042012 cites W2011976959 @default.
• W1975042012 cites W2013220657 @default.
• W1975042012 cites W2015279518 @default.
• W1975042012 cites W2015464139 @default.
• W1975042012 cites W2016656998 @default.
• W1975042012 cites W2017918361 @default.
• W1975042012 cites W2023590574 @default.
• W1975042012 cites W2031282121 @default.
• W1975042012 cites W2042490300 @default.
• W1975042012 cites W2047385803 @default.
• W1975042012 cites W2050088790 @default.
• W1975042012 cites W2050538785 @default.
• W1975042012 cites W2062477145 @default.
• W1975042012 cites W2069699617 @default.
• W1975042012 cites W2074958674 @default.
• W1975042012 cites W2076966287 @default.
• W1975042012 cites W2084592553 @default.
• W1975042012 cites W2105249240 @default.
• W1975042012 cites W2149295256 @default.
• W1975042012 cites W2313721876 @default.
• W1975042012 cites W2328883220 @default.
• W1975042012 cites W2952806258 @default.
• W1975042012 doi "https://doi.org/10.1021/om050202+" @default.
• W1975042012 hasPublicationYear "2005" @default.
• W1975042012 type Work @default.
• W1975042012 sameAs 1975042012 @default.
• W1975042012 citedByCount "18" @default.
• W1975042012 countsByYear W19750420122016 @default.
• W1975042012 countsByYear W19750420122017 @default.
• W1975042012 countsByYear W19750420122018 @default.
• W1975042012 countsByYear W19750420122021 @default.
• W1975042012 countsByYear W19750420122023 @default.
• W1975042012 crossrefType "journal-article" @default.
• W1975042012 hasAuthorship W1975042012A5000195518 @default.
• W1975042012 hasAuthorship W1975042012A5035645976 @default.
• W1975042012 hasAuthorship W1975042012A5035918478 @default.
• W1975042012 hasConcept C116569031 @default.
• W1975042012 hasConcept C155647269 @default.
• W1975042012 hasConcept C161790260 @default.
• W1975042012 hasConcept C170493617 @default.
• W1975042012 hasConcept C178790620 @default.
• W1975042012 hasConcept C185592680 @default.
• W1975042012 hasConcept C188027245 @default.
• W1975042012 hasConcept C2781311116 @default.
• W1975042012 hasConcept C2994428872 @default.
• W1975042012 hasConcept C44228677 @default.
• W1975042012 hasConcept C51886252 @default.
• W1975042012 hasConcept C521977710 @default.
• W1975042012 hasConcept C55493867 @default.
• W1975042012 hasConceptScore W1975042012C116569031 @default.
• W1975042012 hasConceptScore W1975042012C155647269 @default.
• W1975042012 hasConceptScore W1975042012C161790260 @default.
• W1975042012 hasConceptScore W1975042012C170493617 @default.
• W1975042012 hasConceptScore W1975042012C178790620 @default.
• W1975042012 hasConceptScore W1975042012C185592680 @default.
• W1975042012 hasConceptScore W1975042012C188027245 @default.
• W1975042012 hasConceptScore W1975042012C2781311116 @default.
• W1975042012 hasConceptScore W1975042012C2994428872 @default.
• W1975042012 hasConceptScore W1975042012C44228677 @default.
• W1975042012 hasConceptScore W1975042012C51886252 @default.
• W1975042012 hasConceptScore W1975042012C521977710 @default.
• W1975042012 hasConceptScore W1975042012C55493867 @default.
• W1975042012 hasIssue "13" @default.
• W1975042012 hasLocation W19750420121 @default.
• W1975042012 hasOpenAccess W1975042012 @default.
• W1975042012 hasPrimaryLocation W19750420121 @default.
• W1975042012 hasRelatedWork W1975042012 @default.
• W1975042012 hasRelatedWork W1996508350 @default.
• W1975042012 hasRelatedWork W2007390940 @default.
• W1975042012 hasRelatedWork W2055951768 @default.
• W1975042012 hasRelatedWork W2075951081 @default.
• W1975042012 hasRelatedWork W2357082634 @default.
• W1975042012 hasRelatedWork W2359723238 @default.
• W1975042012 hasRelatedWork W4233243901 @default.
• W1975042012 hasRelatedWork W4244317362 @default.
• W1975042012 hasRelatedWork W4308522610 @default.
• W1975042012 hasVolume "24" @default.

• next