US PATENT SUBCLASS 546 / 4
.~.~.~.~ The metal bonded directly to carbon, which carbon is a ring carbon of the six-membered hetero ring or which carbon is attached directly or indirectly to the six-membered hetero ring by nonionic bonding

Current as of: June, 1999
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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}
4.~.~.~.~ The metal bonded directly to carbon, which carbon is a ring carbon of the six-membered hetero ring or which carbon is attached directly or indirectly to the six-membered hetero ring by nonionic bonding

DEFINITION

Classification: 546/4

The metal bonded directly to carbon, which carbon is a ring carbon of the six-membered hetero ring or which carbon is attached directly or indirectly to the six-membered hetero ring by nonionic bonding:

(under subclass 2) Compounds wherein the metal is bonded directly (a) to a ring carbon of the six-membered hetero ring, or (b) to a carbon atom which additionally is attached directly or indirectly to the six-membered hetero ring by nonionic bonding.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]

(2) Note. Excluded from this subclass are compounds such as, e.g., Figure 1 below which require "doubling back" through the metal to satisfy the conditions necessary for inclusion here.: [figure]