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BS8 ITS)Summary Tricarbonyl(butadiene or 2,3-dimethylbutadiene)iron react with hexafluorobut-2-yne in a stepwise fashion yielding, as the final products, substituted tricarbonyl(cyc1ohexa-l,3-diene)iron complexes.

Mycorrhizal fungi colonize cotton roots and stimulate plant growth by absorbing minerals from the soil. These beneficial fungi can be adversely affected by metamsodium, a soil-applied general biocide frequently used for weed control in cotton. Although metam-sodium also kills diseasecausing fungi that reduce cotton stands, the advantages of pest control with metam-sodium must be weighed against added ferfilizer costs needed to offset the loss of mycorrhizae.

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