97976-81-3

Basic information

• Product Name: 1,4-bis(2-ethynylphenyl)buta-1,3-diyne
• Synonyms: 1,4-bis(2-ethynylphenyl)buta-1,3-diyne
• CAS NO: 97976-81-3
• Molecular Weight: 250.299
• Mol File: 97976-81-3.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: 1,4-bis(2-ethynylphenyl)buta-1,3-diyne(CAS DataBase Reference)
• NIST Chemistry Reference: 1,4-bis(2-ethynylphenyl)buta-1,3-diyne(97976-81-3)
• EPA Substance Registry System: 1,4-bis(2-ethynylphenyl)buta-1,3-diyne(97976-81-3)

Safety Data

• Hazardous Substances Data: 97976-81-3(Hazardous Substances Data)

Upstream product

• 766-46-1 2-bromo-1-ethynylbenzene 
• 107793-04-4 1,4-bis(2-bromophenyl)-1,3-butadiyne 
• 191231-69-3 2-[(triisopropylsilyl)ethynyl]-1-[4-(trimethylsilyl)-1,3-butadiynyl]benzene 
• 188003-93-2 triisopropyl((2-((trimethylsilyl)ethynyl) phenyl)ethynyl)silane 
• 91211-32-4 1-(1-Bromvinyl)-2-(seqtrans-2-bromvinyl)-benzol 
• 125782-75-4 2-(2(E)-bromoethenyl)phenylacetylene 
• 22801-07-6 o-bis(α,β-dibromoethyl)benzene 
• 536-74-3 phenylacetylene 
• 155587-93-2 1,4-bis(2-iodophenyl)buta-1,3-diyne 
• 766-50-7 (2-iodophenyl)-acetylene 
• 155587-94-3 1,4-bis[2-(2-trimethylsilylethynyl)phenyl]buta-1,3-diyne 
• 100273-33-4 1,4-Di-(2-(seqtrans-2-bromvinyl)-phenyl)-buta-1,3-diin 

Downstream Products

• 1256573-41-7 1,4-bis[2-trans-Pt(PEt₃)2Cl]phenylbutadiyne 

Relevant articles and documents

Chirality Sensing with Stereodynamic Biphenolate Zinc Complexes

Two bidentate ligands consisting of a fluxional polyarylacetylene framework with terminal phenol groups were synthesized. Reaction with diethylzinc gives stereodynamic complexes that undergo distinct asymmetric transformation of the first kind upon binding of chiral amines and amino alcohols. The substrate-to-ligand chirality imprinting at the zinc coordination sphere results in characteristic circular dichroism signals that can be used for direct enantiomeric excess (ee) analysis. This chemosensing approach bears potential for high-throughput ee screening with small sample amounts and reduced solvent waste compared to traditional high-performance liquid chromatography methods. Chirality 27:700-707, 2015.

Dynamic Figure Eight Chirality: Multifarious Inversions of a Helical Preference Induced by Complexation

We demonstrate two types of inversion of a helical preference upon the 1:1 complexation of a dynamic figure eight molecule with a guest molecule through the controlled transmission of point chirality. We designed a series of macrocycles that prefer a nonplanar conformation with figure eight chirality. These macrocycles are composed of a chirality-transferring unit (terephthalamide) and a structure-modifying unit (two o-phenylene rings spaced with a varying number of triple bonds). The former unit provides a binding site for capturing a guest molecule through the formation of hydrogen bonds. The attachment of chiral auxiliaries to the former unit induces a helical preference for a particular sense through the intramolecular transmission of point chirality. For relatively small-sized macrocycles, the preferred sense was reversed upon complexation with an achiral guest. Contrary preferences before and after complexation were both seen for chiral auxiliaries associated with a figure eight host through two-way intramolecular transmission of the single chiral source. Alternatively, the helical preference induced in relatively large-sized macrocycles was reversed only when a figure eight host formed a 1:1 complex with a particular enantiomeric guest through the supramolecular transmission of point chirality in the guest. This stereospecific inversion of a helical preference is rare.

Syntheses and crystal structures of strained planar silacyclynes containing a diacetylene unit

The synthesis and structural characterization of three silicon diacetylenic heterocyclynes 1,1-diisopropyl-4,5:10,11-dibenzosilacyclotrideca-4,10 diene-2,6,8,12-tetrayne (4), 1,1-dimethyl-4,5:10,11-dibenzosilacyclotrideca-4,10-diene-2,6,8,12-tetrayne (5),