835874-31-2

Upstream product

• 558-13-4 carbon tetrabromide 
• 37166-51-1 p-Methoxyphenyl-trimethylsilyl-butadiin-keton 
• 100-09-4 4-methoxybenzoic acid 
• 100-07-2 4-methoxy-benzoyl chloride 

Downstream Products

• 1416355-59-3 C₂₆H₁₄Br₄O₂ 
• 38177-92-3 p-Methoxy-phenyl-hexatriin 
• 835874-32-3 [6-(4-methoxy-phenyl)-hexa-1,3,5-triynyl]-trimethyl-silane 

Relevant academic research and scientific papers

Synthesis, characterization, and solid-state polymerization of cross-conjugated octatetraynes

Two series of cross-conjugated 1,3,5,7-octatetraynes (1a-1l and 6a-6d) have been synthesized. UV-vis spectroscopic analysis shows that pendent groups connected to the cross-conjugated skeleton have little effect on the λmax energies, irrespective of whether the groups are electron withdrawing or donating. A number of the isolated products readily give crystals suitable for X-ray crystallography, and the solid-state structural properties of five derivatives (1k, 1l, 6a, 6c, and 6d) have been examined by X-ray crystallographic analysis. Parallel packing of the polyynes in the solid state indicates that four of the five samples are potentially suitable for topochemical polymerization, based on solid-state packing parameters θ, R, and d. Attempts to effect a solid-state reaction have been explored through UV-vis and γ-ray irradiation as well as thermal heating. The course of these reactions was monitored by differential scanning calorimetry (DSC) analysis, as well as UV-vis and solid-state 13C NMR spectroscopy (for 1d, 1j, 1k, and 6d), which offered evidence of polymer formation from these reactions. Structural determination of the product(s), however, remains elusive.

Synthesis, structure, and nonlinear optical properties of diarylpolyynes

(Chemical Equation Presented) A series of α,ω-diarylpolyynes has been synthesized. In addition to the synthesis of three hexaynes (3a-c), a notably improved synthesis of 1,16-diphenylhexadecaoctayne (5) is described. The third-order nonlinear optical char