An amalgam of this element is used with hydrochloric acid in the Clemmensen reduction.
Alkenes can react with an iodomethyl-iodide of this element to yield cyclopropanes in the Simmons-Smith reaction. In another reaction, this element is used as a catalyst to form beta-hydroxy esters. An amalgam of this element is used with hydrochloric acid in the Clemmensen reduction. This metal is present in a protein domain with varieties including "treble clef" and "gag knuckle," which is named for the way two cysteine and two histidine residues bind this metal, the namesake "finger" motifs. For 10 points, identify this element employed in galvanization, which forms the alloy brass with copper.
Alkenes can react with an iodomethyl-iodide of this element to yield cyclopropanes in the Simmons-Smith reaction.
Zinc [or Zn]