Transmitting information along oligo-para-phenylenes: 1,12-stereochemical control in a terphenyl tetracarboxamide.

نویسندگان

  • Jonathan Clayden
  • Lluís Vallverdú
  • Madeleine Helliwell
چکیده

Amide-substituted terphenyls adopt a well-defined conformation that allows the transmission of stereochemical information from a controlling centre to a reaction site 11 bond lengths away, providing a model of how extended polymeric systems might be used to communicate binary information.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Greek cross dodecaphenylene: sparteine- mediated asymmetric synthesis of chiralD2- symmetric π-conjugated tetra-o-phenylenes

The asymmetric synthesis of a chiral, nonracemic π-conjugated system with D2 point group of symmetry, dodecaphenylene 4 is described. In the key step, (−)-sparteineand Cu(II)-mediated oxidation of 2,2′-dilithio-1,1′-biaryls in ether gives the corresponding dimers, tetra-o-phenylenes, in 80% isolated yields and 50–60% ee’s. X-Ray crystallography confi rms the structure of rac-4 and its molecular...

متن کامل

Neutron diffuse scattering in deuterated para-terphenyl, C(18)D(14).

Neutron diffuse scattering is used to explore the short-range order (SRO) in deuterated para-terphenyl, C(18)D(14). The crystal shows SRO because the central of the three phenyl groups of each molecule can twist positively or negatively and these twists are correlated over the local scale. The presence of incipient Bragg peaks at [Formula: see text] at 200 K shows that these flips are negativel...

متن کامل

Arene non-innocence in dinuclear complexes of Fe, Co, and Ni supported by a para-terphenyl diphosphine.

Cofacial Fe2, Co2, and Ni2 complexes supported by a para-terphenyl diphosphine ligand were prepared. Central arene deplanarization and a μ2:(η(3),η(3)) coordination mode suggest partial bisallyl character in the Fe2 and Co2 complexes. An oxidation induced shift in Fe2-arene binding highlights the non-innocent nature of the arene ligand.

متن کامل

(E)-1-(4,4′′-Difluoro-5′-meth­oxy-1,1′:3′,1′′-terphenyl-4′-yl)-3-phenyl­prop-2-en-1-one

The title compound, C(28)H(20)F(2)O(2), is a polysubstituted terphenyl derivative bearing a Michael system. The C=C double bond is E configured. In the crystal, C-H⋯O and C-H⋯F contacts connect the mol-ecules, forming undulating sheets that lie perpendicular to the crystallographic a axis. The shortest π-π inter-action [centroid-centroid distance = 3.7163 (7) Å] involves the para-fluoro-phenyl ...

متن کامل

Synthesis and Photophysical Properties of Biphenyl and Terphenyl Arylene–Ethynylene Macrocycles

A series of single-walled carbon nanotube precursors, C3h-symmetric cyclotri(ethynylene)(biphenyl-2,4'-diyl) and cyclotri(ethynylene)(p-terphenyl-2,4″-diyl), have been prepared by a linear stepwise oligomerization-cyclization route and by statistical intermolecular cyclooligomerization. In addition to producing these members of a novel class of arylene ethynylene macrocycles, 1 and 2, the latte...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Chemical communications

دوره 23  شماره 

صفحات  -

تاریخ انتشار 2007