نتایج جستجو برای: co nd ring
تعداد نتایج: 481152 فیلتر نتایج به سال:
Ad Addr dr res es ess s s fo fo for r Co Co orr rr rre es espo po pond nd nde ence ce e: : :
Ad Addr dr dres es ess s s fo fo for r r Co Co orr rres es e po po pond nd nden e ce ce ce: :
Ad Addr dr dres es ess s s fo fo for r r Co Co orr rres es e po po pond nd nden e ce ce ce: :
Ad Addr dr dres es ess s s fo fo for r r Co Co orr rres es e po po pond nd nden e ce ce ce: :
The combination of a neodymium borohydride, Nd(BH4)3(THF)3 (1) or Cp*Nd(BH4)2(THF)x (2), with MgBuEt (BEM), affords an efficient and highly selective (up to 96.7% 1,4-trans) catalyst for butadiene polymerization. In the presence of excesses of Mg co-catalyst, polymer chain transfer takes place between neodymium and magnesium, and significant amounts of 1,2-units are observed. When considered fo...
Ad Addr dr dres es ess s s fo fo for r Co Co orr rr rre es espo po pond nd nden e ce ce e: : :
The open question, NP P ? = , was presented by Cook (1971) [1]. In this paper, a proof that NP P ≠ is presented. In addition, it is shown that NP co NP P − ∩ ⊂ . Finally, the exact inclusion relationships between the classes P, NP and co-NP are presented (see Fig. 3). NOTATION D Deterministic Turing machine [2]. ND Nondeterministic Turing machine [2]. D A new deterministic machine that is intro...
The metal atom of the Cr(CO)(3) unit of the title compound, [Cr(C(17)H(14)O(4))(CO)(3)], is coordinated to the methoxy-phenyl ring of the isoflavone ligand; the Cr(CO)(3) unit exhibits a three-legged piano-stool conformation. The aromatic ring of the methoxy-phenyl group is twisted by 42.49 (9)° with respect to the γ-pyrone ring. In the fused-ring, the dihedral angle between the phenyl-ene and ...
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