Magnesium dichloride dimer

Titanocene dichloride, methyl magnesium chloride, DMT, and the dimer decomposition product of DMT are all visible by mid-IR. The absorbances for titanocene dichloride and DMT overlap, and monomethylmonochloro titanocene, a transient intermediate observed by NMR and normal-phase HPLC, was initially not detected by mid-IR but was assumed to have similar absorbance. 

CARBONYLATIONS Bis(triphenylphosphine)palladium dichloride. Chlorodicarbonyl-rhodium(l) dimer. Carbon dioxide. Chloromethyl methyl ether. Magnesium methyl carbonate. 

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