Matches in SemOpenAlex for { <https://semopenalex.org/work/W2083846738> ?p ?o ?g. }
- W2083846738 endingPage "1819" @default.
- W2083846738 startingPage "1808" @default.
- W2083846738 abstract "The mono(guanidinato) complex Cp(guan)ZrCl2 (1; guan = η2-(iPrN)2C(NMe2)) was prepared by treatment of CpZrCl3 (Cp = η5-C5H5) with the in situ generated lithium guanidinate salt 2. The dimethylamino group of 1 resists quaternization by alkylating and silylating reagents. Complex 1 undergoes ligand redistribution when treated with 2 equiv of MeLi, but reaction with 2 equiv of MeMgCl affords the dimethyl derivative Cp(guan)ZrMe2 (3). Insertion of 2 equiv of diisopropylcarbodiimide into the Zr−N bonds of (Me2N)2ZrCl2(THF)2 produces the bis(guanidinato)zirconium dichloride complex (guan)2ZrCl2 (4). Alkylation of 4 with 2 equiv of MeLi or PhCH2MgCl affords the dialkyl derivatives (guan)2ZrMe2 (5) and (guan)2Zr(CH2Ph)2 (6), respectively. Variable-temperature NMR experiments on 6 reveal a limiting C2-symmetric solution structure at 253 K. Complex 5 undergoes reaction with electrophiles (Me3SiOTf (OTf = OSO2CF3), B(C6F5)3, [Ph3C][B(C6F5)4]) to yield stable products of methide abstraction: neutral complexes (guan)2Zr(OTf)2 (7) and (guan)2Zr(Me)OTf (8), base-free cationic alkyl salts [(guan)2ZrMe][MeB(C6F5)3] (9) and [(guan)2ZrMe][B(C6F5)4] (10), and the dinuclear methyl-bridged cation [((guan)2ZrMe)2-μ-Me][B(C6F5)4] (11). Complexes 1, 4−7, and 11 have been characterized by X-ray diffraction. Dinuclear cation 11 exhibits bridge−terminal methyl exchange on the NMR time scale at room temperature, with decoalescence observed at 224 K. Dibenzyl complex 6 undergoes reaction with [Ph3C][B(C6F5)4] in CH2Cl2, yielding the cationic benzyl complex [(guan)2Zr(CH2Ph)][B(C6F5)4] (15). Spectroscopic data imply that the benzyl ligand of 15 adopts an undistorted monodentate coordination mode. Complexes 4, 5, and 10 were found to have low to moderate activities for the polymerization of α-olefins." @default.
- W2083846738 created "2016-06-24" @default.
- W2083846738 creator A5011001426 @default.
- W2083846738 creator A5014503817 @default.
- W2083846738 creator A5047518475 @default.
- W2083846738 creator A5076067733 @default.
- W2083846738 date "2001-03-30" @default.
- W2083846738 modified "2023-10-16" @default.
- W2083846738 title "Synthesis, Structural Investigation, and Reactivity of Neutral and Cationic Bis(guanidinato)zirconium(IV) Complexes" @default.
- W2083846738 cites W1531109116 @default.
- W2083846738 cites W1964431300 @default.
- W2083846738 cites W1964658272 @default.
- W2083846738 cites W1965482453 @default.
- W2083846738 cites W1974681653 @default.
- W2083846738 cites W1983604746 @default.
- W2083846738 cites W1988084900 @default.
- W2083846738 cites W1988350776 @default.
- W2083846738 cites W1988437590 @default.
- W2083846738 cites W1989092124 @default.
- W2083846738 cites W1991046506 @default.
- W2083846738 cites W1994083741 @default.
- W2083846738 cites W1998369057 @default.
- W2083846738 cites W1998398542 @default.
- W2083846738 cites W2000883516 @default.
- W2083846738 cites W2003088738 @default.
- W2083846738 cites W2003810188 @default.
- W2083846738 cites W2006259775 @default.
- W2083846738 cites W2008591057 @default.
- W2083846738 cites W2012591289 @default.
- W2083846738 cites W2016295163 @default.
- W2083846738 cites W2016659736 @default.
- W2083846738 cites W2018949339 @default.
- W2083846738 cites W2022244698 @default.
- W2083846738 cites W2023047807 @default.
- W2083846738 cites W2025285292 @default.
- W2083846738 cites W2028644788 @default.
- W2083846738 cites W2030667322 @default.
- W2083846738 cites W2030932618 @default.
- W2083846738 cites W2031236542 @default.
- W2083846738 cites W2032590147 @default.
- W2083846738 cites W2033338484 @default.
- W2083846738 cites W2034364553 @default.
- W2083846738 cites W2035424916 @default.
- W2083846738 cites W2036356924 @default.
- W2083846738 cites W2039006756 @default.
- W2083846738 cites W2042608409 @default.
- W2083846738 cites W2043054940 @default.
- W2083846738 cites W2044180032 @default.
- W2083846738 cites W2044255068 @default.
- W2083846738 cites W2044388061 @default.
- W2083846738 cites W2044690823 @default.
- W2083846738 cites W2052345427 @default.
- W2083846738 cites W2052563263 @default.
- W2083846738 cites W2052780983 @default.
- W2083846738 cites W2059747135 @default.
- W2083846738 cites W2062147862 @default.
- W2083846738 cites W2065709347 @default.
- W2083846738 cites W2070738837 @default.
- W2083846738 cites W2072756436 @default.
- W2083846738 cites W2076490484 @default.
- W2083846738 cites W2080182825 @default.
- W2083846738 cites W2082024067 @default.
- W2083846738 cites W2083924613 @default.
- W2083846738 cites W2087265941 @default.
- W2083846738 cites W2094829778 @default.
- W2083846738 cites W2095088697 @default.
- W2083846738 cites W2102208605 @default.
- W2083846738 cites W2104550472 @default.
- W2083846738 cites W2107556142 @default.
- W2083846738 cites W2118546768 @default.
- W2083846738 cites W2125754176 @default.
- W2083846738 cites W2127387930 @default.
- W2083846738 cites W2140599466 @default.
- W2083846738 cites W2144698216 @default.
- W2083846738 cites W2147319654 @default.
- W2083846738 cites W2149295256 @default.
- W2083846738 cites W2153900045 @default.
- W2083846738 cites W2197450742 @default.
- W2083846738 cites W2284863604 @default.
- W2083846738 cites W2318881486 @default.
- W2083846738 cites W2326547357 @default.
- W2083846738 cites W2329366776 @default.
- W2083846738 cites W239311954 @default.
- W2083846738 cites W2950466935 @default.
- W2083846738 cites W2951446988 @default.
- W2083846738 cites W2952388584 @default.
- W2083846738 doi "https://doi.org/10.1021/om000995u" @default.
- W2083846738 hasPublicationYear "2001" @default.
- W2083846738 type Work @default.
- W2083846738 sameAs 2083846738 @default.
- W2083846738 citedByCount "98" @default.
- W2083846738 countsByYear W20838467382012 @default.
- W2083846738 countsByYear W20838467382013 @default.
- W2083846738 countsByYear W20838467382014 @default.
- W2083846738 countsByYear W20838467382015 @default.
- W2083846738 countsByYear W20838467382016 @default.
- W2083846738 countsByYear W20838467382018 @default.
- W2083846738 countsByYear W20838467382021 @default.