This metal is the center of the Petasis reagent, and it is also found in Tebbe's reagent, which is an aluminum-containing metallocene of this element.
One chloride of this element may be used with dibromomethane and zinc metal to convert ketenes to allenes in a method found independently by Lombardo and Takai. This element's affinity for oxygen is essential to the second step of the McMurry reaction; another chloride of this element is used to activate silyl enol ethers. This element's trichloride is used in polypropylene production. The two processes used to obtain this element use reduction with coke and fractional distillation followed by liquid metal reduction; the first used sodium and the second used more easily recycled liquid magnesium. Impurities of this element's dioxide give star sapphires their asterism. This metal is the center of the Petasis reagent, and it is also found in Tebbe's reagent, which is an aluminum-containing metallocene of this element. This element is found with aluminum in Ziegler-Natta catalysts. Isolated by the Hunter and Kroll processes, for 10 points, name this strong metal which is extracted from ores called ilmenite and rutile.
One chloride of this element may be used with dibromomethane and zinc metal to convert ketenes to allenes in a method found independently by Lombardo and Takai.
{titanium}