Selenium Trioxide - Structure

Structure

In the solid phase SeO3 consists of cyclic tetramers, with an 8 membered (Se-O)4 ring. Selenium atoms are 4 coordinate, bond lengths are Se-O bridging are 175 pm and 181pm, non-bridging 156 and 154 pm.

SeO3 in the gas phase consists of tetramers and monomeric SeO3 which is trigonal planar with an Se-O bond length of 168.78 pm.

Read more about this topic:  Selenium Trioxide

Famous quotes containing the word structure:

    What is the structure of government that will best guard against the precipitate counsels and factious combinations for unjust purposes, without a sacrifice of the fundamental principle of republicanism?
    James Madison (1751–1836)

    Agnosticism is a perfectly respectable and tenable philosophical position; it is not dogmatic and makes no pronouncements about the ultimate truths of the universe. It remains open to evidence and persuasion; lacking faith, it nevertheless does not deride faith. Atheism, on the other hand, is as unyielding and dogmatic about religious belief as true believers are about heathens. It tries to use reason to demolish a structure that is not built upon reason.
    Sydney J. Harris (1917–1986)

    It is difficult even to choose the adjective
    For this blank cold, this sadness without cause.
    The great structure has become a minor house.
    No turban walks across the lessened floors.
    The greenhouse never so badly needed paint.
    Wallace Stevens (1879–1955)