arylCCPh

arylCCPh is an informal chemical fragment notation used to indicate an aryl (Ar) moiety connected through a two-carbon sequence to a phenyl (Ph) group. The notation is not standardized and appears in different contexts with slightly different structural meanings depending on the author or software: it can represent an aryl–C≡C–Ph (diarylalkyne), an aryl–CH=CH–Ph (diarylalkene), or an aryl–CH2–CH2–Ph (diarylalkane) connectivity. Because of this ambiguity, interpretation relies on surrounding context such as reaction type, mechanism, or explicit structural identifiers.

In organic synthesis and catalysis the general motif Ar–C–C–Ph recurs in classes of compounds including diarylalkynes (e.g., diphenylacetylene), diarylalkenes (e.g., stilbene derivatives) and diarylalkanes. These motifs show characteristic reactivity: conjugated diaryl systems participate in π–π interactions and have distinct electronic and optical properties, alkynes and alkenes undergo metal-catalyzed coupling and addition reactions, and saturated diarylalkanes are common in reduction and hydrogenation chemistry.

In cheminformatics and reaction templates, a compact label like arylCCPh can be used to simplify pattern matching and transform definitions, but users should verify the intended connectivity. Synthetic planning often employs palladium-catalyzed cross-coupling, Sonogashira alkynylation, or olefination strategies to construct such fragments. Safety and environmental considerations depend on specific substituents; basic precautions for handling aromatic and unsaturated organic compounds apply.