ライフサイエンスコーパス: metallocene

1 at the heterotopic coordination sites of the metallocenes.

2 he presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2(eta5-C5H-3,5-(CHMe2)2)(eta5-C

3 iciencies approximately 10x greater than its metallocene analogue, ferrocene/ferrocenium.

4 ciated with the geometry differences between metallocene and [(eta(6)-fulvene)(eta(5)-cyclopentadieny

5 on-aqueous uranium chemistry mainly involved metallocene and classical alkyl, amide, or alkoxide comp

6 grams that are more than just the sum of the metallocene and the parent pz's.

7 entadienyl ligands together in strained ansa metallocenes are rare and limited to carbon-carbon doubl

8 In this study, 20 metallocene-based compounds comprising extensive structu

9 A general method for rapid construction of metallocene-based hosts is described.

10 SiMe(2)(CH(2)CH=CH(2))](-), forms unsolvated metallocenes, [(C(5)Me(4))SiMe(2)(CH(2)CH=CH(2))](2)Ln (

11 ethane (TMM) dianion complexes of lanthanide metallocenes, [(C5Me5)2Ln]2[mu-eta3:eta3-C(CH2)3] (Ln =

12 rovide access to unsolvated alkyl lanthanide metallocenes, [(C5Me5)2LnR]x, which display high C-H act

13 (MAO = methyl alumoxanes) is the most active metallocene catalyst for polypropylene reported to date.

14 in a silica nanotube reactor (SNTR) using a metallocene catalyst in conjunction with methylaluminoxa

15 nyl (Cp)-R(2)E(C,Si)-fluorenyl (Flu) group 4 metallocene catalyst systems examined-which varied in me

16 e destructive interaction of highly reactive metallocene catalysts with classical silica-based suppor

17 in contrast to traditional surface-supported metallocene catalysts.

18 MAO is the co-catalyst in metallocene catalytic systems, which are widely used in

19 Studies of metallocene-catalyzed alkene polymerization at room temp

20 Metallocene-catalyzed polymerization of 1-alkenes offers

21 g the activity and termination mechanisms of metallocene-catalyzed polymerizations.

22 ne (or styrene) and then to hydrogen, during metallocene-catalyzed propylene polymerization by rac-Me

23 report describes an unanticipated benefit of metallocene-catalyzed semicrystalline polyolefins, namel

24 The metallocene cation complex [Cp*2ZrCH3](+)[B(C6F5)4](-) i

25 Treatment of the metallocene cation complexes [Cp*2MCH3](+)[B(C6F5)4](-)

26 nnecting the tetraphenylborate anion and the metallocene cation.

27 tion of the bis(tetramethylcyclopentadienyl) metallocene chemistry of scandium has revealed that the

28 H(2) or phenylacetylene furnished isocyanato metallocene complexes with bridging imido (mu-NH) ligand

29 ) produces EPR signals assignable to Zr(III) metallocene complexes.

30 that diameter-selective encapsulation of two metallocene compounds bis(cyclopentadienyl) cobalt and b

31 The bent d(0) titanium metallocene (Cp)(2)Ti(NCS)(2) exhibits an intense phosph

32 erties of the isocarbonyl-ligated dysprosium metallocene [Cp*2 Dy{mu-(OC)2 FeCp}]2 (1Dy ), which cont

33 The reactions of the divalent lanthanide metallocenes [Cp*2Ln(thf)2] (Cp* = eta(5)-C5Me5; Ln = Sm

34 ion of a chloride ligand from the dysprosium metallocene [(Cp(ttt) )2 DyCl] (1Dy Cp(ttt) =1,2,4-tri(t

35 ate polymerization with unbridged rare earth metallocenes (Cp2LnX) follows a complex reaction pathway

36 eduction of sodium azide with organometallic metallocene derivatives, [(C5Me4R)2U][(mu-Ph)2BPh2] (R =

37 Reduction of group 4 metallocene dichlorides with magnesium in the presence o

38 the N(2) ligand, the longest observed in any metallocene dinitrogen complex.

39 tive dimerized stannylene or plumbylene gave metallocene ditetrylene complexes.

40 nd ligand substitution pattern-cationic ansa-metallocene ester enolate catalyst 6(+)[B(C(6)F(5))(4)](

41 -brown salts of the first entirely inorganic metallocene, [(eta5-P5)2Ti](2-)(1).

42 and a method for its conversion to the ansa-metallocene [ethylene(eta5-inden-1-yl)(eta5-inden-2-yl)]

43 ich the cis-enediolate group bridges the two metallocene fragments.

44 or the formaldehyde dianion bridges the two metallocene fragments.

45 F)2 followed by hydrogenation of the product metallocene furnishes ansa-titanocene 4.

46 are known to stabilize three ligands in the metallocene girdle to form saturated (C(5)H(5))(2)ML(3)

47 Ethylene/propylene copolymerization with metallocenes having heterotopic active sites (R =Me, i-P

48 and polymerization data for new isospecific metallocenes (heterocenes) having cyclopentenyl ligands

49 Treatment of the bulky metallocene hydride Cp*2Zr(H)OMes (Cp* = pentamethylcycl

50 The reaction of the low valent metallocene(II) sources Cp'(2)Ti(eta(2)-Me(3)SiC(2)SiMe(

51 Complexes of Group 4 metallocenes in the +3 oxidation state and amidoborane o

52 identical withC-PPh2, with selected group 4 metallocenes is presented.

53 d with the bridge and the substituent on the metallocene ligand.

54 ation of ethylene and propylene with bridged metallocenes Me(2)E(3-RCp)(Flu)X(2)/MAO (E = C, X = Me;

55 lectronic, and magnetic properties of double metallocene nanowires PnM(2) (Pn = C(8)H(6), M = V, Cr,

56 he most stable structure among the 1D double metallocene nanowires.

57 cumvented by using steric bulk either at the metallocene or with a donor ligand in the wedge.

58 macrocyclic systems tethered to an integral metallocene platform.

59 Silicon-bridged metallocenes produce copolymers with higher activity and

60 DFT calculations on C5H5 model metallocenes show that the reaction of Cp2CeH with CO an

61 When activated with methylaluminoxane, these metallocenes show unprecedented activity for the polymer

62 A series of enantiopure C1-symmetric metallocenes, [(SiMe2)2[eta5-C5H(CHMe2)2][eta5-C5H2((S)-

63 Stereoblock polymerization with chiral ansa-metallocene/strong Lewis acid hybrid catalysts capable o

64 This conformation complements the metallocene structures of rac-8a-e but would destabilize

65 The results of metallocene syntheses from other Zr amide precursors sup

66 insight into the electronic structure of the metallocene-terminated allylium cations.

67 ene phosphine adducts yielded the respective metallocene tetrylene phosphine complexes.

68 Like ferrocene and other carbon-based metallocenes, the structure of 1 has parallel and planar

69 ess resembles a transformation reaction from metallocene to living anionic polymerization.

70 inert (eta(5)-C(5)Me(5))(1-) ligands in each metallocene unit to form a series of heteroleptic bimeta

71 zation catalyzed by a set of zirconium-based metallocenes was studied by NMR using dissolution dynami

72 ow changes in M-Cl orbital mixing within the metallocene wedge are correlated with periodic trends in

73 pivalonitrile at a lateral site at the bent metallocene wedge with retention of the Zr-P bond.

74 tactic PEPEP sequences were observed for all metallocenes, while the tacticities of the EPPE sequence

75 as synthesized by reaction of (2-lithiovinyl)metallocenes with formylmetallocenes, followed by treatm