CHEM 4701 Lecture Notes - Lecture 1: Reducing Agent, Aircraft Communications Addressing And Reporting System, Pampas
Document Summary
Ability to labilize the ligand in the trans position = trans effect: has 2 components (kinetic and the best ones = cn-, co, c2h4, no > pr3 (phosphene), h- > ch3 left = best good trans-labilizer: pi-acids, softness. , i-, scn- > br- > cl- > py > nh3 > h2o, oh: thermodynamic component --> trans influence. R- , ar-, h- > pr3 > asr3 > co, cn-, c2h4: kinetic component --> linked to transition state. -> if you stabilize your transition state, you decrease. ->decreasing delta g increases k (rate of rxn) b/c easier to go up smaller hill. @ l" site: preferred by pi-acids --> pi acids stabilize trigonal bipyramidal structure by removing more electron density from the metal); pi acid = pi acceptor and pi base = pi donor. 3 total isomers can start w/ cheapest ligand ptcl4 trans effect: br-> cl- > py > nh3 bond-strength: pt-nh3 >=~ pt-py > br- > cl-
