Abstract
Since the first reported structure of a quadruply bonded ditungsten complex in 1977, the field of W 2(II, II) chemistry has expanded as new synthetic methodologies have been developed. Based on a recently developed synthetic route in our laboratory, the synthesis and structures of two new W 2(II, II) complexes with substituted formamidinate ligands are reported. With the addition of these two new structures, the number of structurally characterized quadruply bonded W 2(II, II) complexes exceeds 50 and over 100 W 2(II, II) complexes have been synthesized. A compilation of the quadruply bonded W 2(II, II) compounds, W–W bond distances, and synthetic methodologies is presented.
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