US PATENT SUBCLASS 558 / 187
.~.~.~.~ The chalcogen is bonded directly to a benzene ring and to acyclic carbon


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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
70  DF  .~ Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon) {18}
177  DF  .~.~ Chalcogen attached indirectly to the phosphorus by acyclic nonionic bonding {2}
183  DF  .~.~.~ Plural carbons bonded directly to the same chalcogen which is attached indirectly to the phosphorus by acyclic nonionic bonding (e.g., ethers, etc.) {6}
187.~.~.~.~ The chalcogen is bonded directly to a benzene ring and to acyclic carbon


DEFINITION

Classification: 558/187

(under subclass 183) Compounds wherein an acyclic carbon and a benzene ring are bonded directly to the chalcogen.

(1) Note. An example of a compound provided for herein is: [figure]