US PATENT SUBCLASS 546 / 8
.~.~.~.~ The metal is in an anion and the six-membered hetero ring is in a cation

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
2  DF  .~.~.~ Heavy metal or aluminum containing {8}
8.~.~.~.~ The metal is in an anion and the six-membered hetero ring is in a cation {1}
9  DF  .~.~.~.~.~> The metal is bonded directly to halogen in the anion

DEFINITION

Classification: 546/8

The metal is in an anion and the six-membered hetero ring is in a cation:

(under subclass 2) Compounds wherein the metal is in an anion, i.e., a group with a negative charge, and the six-membered hetero ring is in a cation, i.e., a group with a positive charge.

(1) Note. These compounds are usually pyridinium salts of metallates, e.g., [figure] [figure]

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