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Organoscandium chemistry
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<p>Organoscandium chemistry is an area with <a href="/facts/Organometallic_compounds/bhqFz2P0">organometallic compounds</a> focused on compounds with at least one <a href="/facts/Carbon/ukrgQexo">carbon</a> to <a href="/facts/Scandium/TJRt1chg">scandium</a> <a href="/facts/Chemical_bond/ArNUMnIB">chemical bond</a>. The interest in organoscandium compounds is mostly academic but motivated by potential practical applications in <a href="/facts/Catalysis/LPBS7TQC">catalysis</a>, especially in <a href="/facts/Polymerization/1hmBz7Ur">polymerization</a>. A common precursor is <a href="/facts/Scandium_chloride/Aq5626zG">scandium chloride</a>, especially its THF complex. </p><p>As with the other elements in <a href="/facts/Group_3_element/q60AHJ7U">group 3</a> – e.g. <a href="/facts/Yttrium/BlX6rj99">yttrium</a>, forming <a href="/facts/Organoyttrium_compound/RSgTzMMs">organoyttrium compounds</a> – and the <a href="/facts/Lanthanide/rt3XIRCl">lanthanides</a>, the dominant <a href="/facts/Oxidation_state/W53W6s6V">oxidation state</a> for scandium in organometallic compounds is +3 (<a href="/facts/Electron_configuration/TQjRr22P">electron configuration</a> [Ar] 3d14s2). The members of this group also have large <a href="/facts/Ionic_radius/C3dwKrrB">ionic radii</a> with vacant s,p and d orbitals (88 <a href="/facts/Picometer/Cb54mVBX">pm</a> for Sc3+ compared to 67 pm for <a href="/facts/Aluminum/7wmR8jYE">Al</a>3+) and as a result they behave as hard <a href="/facts/Lewis_acid/qlLqRvg2">Lewis acids</a> and tend to have high <a href="/facts/Coordination_number/mf48hsoX">coordination numbers</a> of 9 to 12. The metal to ligand <a href="/facts/Chemical_bond/ArNUMnIB">chemical bond</a> is largely <a href="/facts/Ionic_bond/R6nUJI5u">ionic</a>. </p>