Homologous chromium, molybdenum, and tungsten derivatives of 6-chloro-2-hydroxypyridine. Inductive effects on the metal-metal bond length. Inorganic Chemistry, (19)6:1453--1457, 1980. [PUMA: binuclear binuclear;tungsten bond bond;inductive bond;molybdenum bond;structure chlorohydroxypyridine chromium effect metal transition]