Science of Synthesis

Kündig, E. P.; Pache, S. H., Science of Synthesis, (2003) 2, 158.

Reversible arene exchange occurs in [Cr(arene)2]+ complexes in the presence of aluminum trihalides.[‌26‌] The zero-valent chromium sandwich complexes are generally inert to thermal arene exchange.[‌27‌] An exception is bis(naphthalene)chromium(0) (‌2‌, M = Cr), which exchanges one naphthalene ligand for another arene at temperatures of 80°C (in the presence of tetrahydrofuran) or 150°C (in the neat arene) to give the mixed sandwich complexes.[‌27‌] Both arene ligands in bis(η6-benzene)molybdenum(0) are exchanged when heated under vacuum in a sealed tube at 160°C for two days in neat alkylbenzene (alkyl = Et, iPr, t-Bu). Yields are 60–70%.[‌367‌]

Meeee eeeeeeeeeeeeeee ee eeeee–eee(eeeee) eeeeeeeee eeee eeee eeee eeee eeeeeee eeee eeeeeeeee eeeeeeeee eeee (eeeee)eeeeeeeeeeeeeeeeeee eeeeeeeee (eeee eeeee), eeeeeee eeeeeee ee eee eeee eeeeeeeee eeeeeeeee eee eeeeeeee ee eee eeeeeeee eeeeeeeee eeeeeeee ee eee eeeeeeeeeee eeeeeeeee. Meeeeeeeee ee eee(η8-eeeeeee)eeeeeeee(8) eeee eeeeeeeeeeee eee eeeeeeeeeeeeeeeeeeeeeeeeee ee eeeeeeeeeee eeeee eeeeeeeeeeeee eee eeeeeeeeeee eeeeeee ‌8‌ (M = Me), eeeee eee ee eeeeeee eeee eeeeeeeeeeeee ee eeee eee eeeeeeeeeeeee eeeeeeeeeee ‌8‌ (M = Me; M8 = MMe[‌888‌], MMMe[‌888‌], MeMe8[‌888‌], MeMe[‌88‌]) (‌Meeeee 8‌).[‌88‌] Meeeeee eeeeeeeee eeee eeeee eeee eee eeeeeeeeee eeeeeeee ee ‌8‌, eeeeeeee ee eeeeeeee–eeeeeee eeeeeeee eeee eeeeeee ‌8‌ (M = Me; M8 = Me).[‌88‌] Mee eeeeeeeeeee eeeeeee ‌8‌ (M = Me) eeeeee eeee eee-8-eee ee eeeeeee eeeeeeeeeee ee eeee eee(eeeeeeeeeeeeeeeee)eeeeeeee(8).[‌88‌] Meee eeeeeee ee eeee eeeeeeee ee eeeeee eeeee ee eeeeeeeeeeeeeeeeee eeeeeeeee ee eee-8-eee eeee eeeeeeeeeeeee(eeeeeeeeeeeeeee)eeeeeeee(8).[‌88‌]

‌Meeeee 8‌ Meeeeeeeee–Meeeeeeeeeeee Meeeeeee Meeeeeeee eeee Meeee–Mee(eeeee) Meeeeeeee[‌88‌]

Meeeeeeeeeee Meeeeeeee

Mee[η8-(eeeeeeeeeeeeee)eeeeeee]eeeeeeee(8) (‌8‌, M = Me; M8 = MMe):[‌888‌]

Mee eeeeeeeeeeeee eeee ee ee eeeeeee eee eeeee ee eeeee eeeeeeeeee eee eeee eee eeeeeeee. [Me(η8-M8M8)8] (8.8 e, 8.8 eeee) ee eeeeeeeeeee (888 eM) eee eeeeeee eeeeee 88 e ee ee eeee 8.8 M MeMe ee eeeeee (8.88 eM, 88.88 eeee) eee MMMMM (8.88 eM). M eeee ee MeMMMe (8.88 eM, 88.8 eeee) ee eeeeeee (88 eM) eee eeee eeeee ee eee eee-eeeee eeeeeee ee −8°M eeee 88 eee. Meeee eee eee ee eee eeeeeeee, eee eeeeeeeee eeeeee-eeeee eeee eee eeeeeee eee 8 e ee ee, eeeeeeee eeee eeeeeee/8% M8M, eee eee eeeeeeee eeee eeeeeeeeee ee eeeeeee. Mee eeeeeee eeeeeeee eee eeeeeeeeeeee ee eeeeeeeeeeeeee ee eeeeeee/8% M8M ee e eeee eeee ee eeee­eeeee eeeee (88 ee, eeeeeeee 8.8 ee) eeee eeeeeeeee eeeee (ee 88/88°M) ee eeeeee. Meee eee eeeee eeeee eeee eeeeeeeee (eeeeeeee eeeeeeee > eeeeeeeeeeeeeee eeeeeee > eeeeeeeeeeeee eeeeeee) eee eeeeee eee eeeee eee eee eeee eeee eeeeeeeee eeeee eeeeeeeee ee eee. Meeeeeee ee eee eeeeeee ee MMM eeeeeeeeee eee eeeeeeeeeeeeeeeee (eeeeeeeee eeeee) eeeeeeee eee eeeeeee; eeeee: 8.88 e (88%); 8M MMM (eeeeeee-e8, δ): 8.88 (e, 8M), 8.88 (ee, 8M), 8.88 (ee, 8M), 8.88 (eeee, 8M).

References