A mixed manganese and chromium carbonyl complex of 2-benzylpyrrole

Abstract

A tricarbonylmanganesetricarbonylchromiumThe mixture was again chromatographed on silica gel and, apart from unreacted starting materials, three compounds were isolated and each was recrystallized from petroleum --(60-80').These were (I) 2-benzyl-n-pyrrolylmanganese WE report the preparation and characterization of tricarbonyl, (11) 2-(n-benzylchromium tricarbonyl) pyrrole, 2-(n-benzylchromium tricarbony1)-n-pyrrolylmanganese tri-and a third compound (111) which was bright yellow in carbonyl which we believe to be the first reported compound colour and melted a t 103-104".This compound proved complex of 2-benzylpyrrole and the separate tricarbonylmetal complexes have been prepared and characterized.

Palladium-Catalyzed Chloride Substitution of η5-(Chlorocyclohexadienyl)Mn(CO)3Complexes: An Access to Novel η6-(Arene)Mn(CO)3+Cations

“…Such compounds are difficult or impossible to prepare selectively by direct complexation. For example, it is known that metalation of 2-phenylpyrrole gave exclusively 2-phenyl-(η 5 -pyrrolyl)tricarbonylmanganese and that phenylacetylene could not be coordinated to the Mn(CO) 3 entity . We were interested in preparing 2-thienyl-(η 6 -anisole)Mn(CO) 3 + by rearomatization of η 5 (1-thienyl-4-methoxycyclohexadienyl)Mn(CO) 3 5c .…”

Preparation of Chromium−Manganese Diarene Heterobimetallic Complexes Using a Mn(CO)3+ Transfer Reaction

“…The coordination of the Cr(CO) 3 group to the phenyl ring was verified by the upfield shifts of the phenyl ring protons in 1 H NMR spectra and X-ray structural studies of 10 , 14 , and 16 . In contrast with the phenyl preference of Cr(CO) 3 moiety, the Mn(CO) 3 + group prefers heterocyclic rings to phenyl rings …”

“…In contrast with the phenyl preference of Cr(CO) 3 moiety, the Mn-(CO) 3 + group prefers heterocyclic rings to phenyl rings. 14 The reactions of (naphthalene)Mn(CO) 3 + with (diarene)chromium complexes 1, 3, 5, 7, 9, 11, 13, and 15 give the Cr-Mn diarene complexes 2, 4, 6, 8, 10, 12, 14, and 16 in moderate yields (31-75%). Compounds 2, 4, 6, 8, 10, 12, 14, and 16 have been characterized by IR, 1 H NMR, and elemental analysis, and all data are consistent with their formulations as compounds 2, 4, 6, 8, 10, 12, 14, and 16.…”

“…1 H NMR (d 6-acetone): δ 7.66 (dd, 15.4, 10.4 Hz, 1 H, H 8 ), 7. 20 (dd, 15.4, 3.2 Hz, 1 H, H 9 ), 7.03 (m, 4 H, H 10,11,13,14 ), 6.73 (m, 3 H, H 6,7,12 ), 5.99 (d, 2.6 Hz, 2 H, H 1,5 ),5.73 (t,2.6 Hz,3 H,H 2,3,4 ) ppm. Anal.…”

“…[{µ-η 6 :η 6 -trans-1-phenyl-2-(2′-thienyl)-ethene}CrMn-(CO) 6]BF4 (14). [(naphthalene)Mn(CO)3]BF4 (0.263 g, 0.74 mmol) and 13 (0.20 g, 0.62 mmol) were dissolved in 30 mL of CH2Cl2.…”