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Selective Formation of cis (X)‐ and trans (X)‐Ru(dmbpy)(CO) 2 X 2 Complexes (X = Cl, Br, I, SCN) from Monomeric and Dimeric Ru–mono(dmbpy) Carbonyl Complexes (Dmbpy = 4,4′‐Dimethyl‐2,2′‐bipyridine)
Author(s) -
Homanen Pertti,
Haukka Matti,
Luukkanen Saija,
Ahlgrén Markku,
Pakkanen Tapani A.
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199901)1999:1<101::aid-ejic101>3.0.co;2-s
Subject(s) - chemistry , halogen , ruthenium , dimer , halide , hydrogen bond , halogen bond , 2,2' bipyridine , bipyridine , monomer , medicinal chemistry , crystallography , molecule , catalysis , inorganic chemistry , organic chemistry , polymer , crystal structure , alkyl
Aqueous hydrogen halides HX (X = Cl, Br, I) are shown to be excellent halogen sources for the synthesis of a series of halogen‐containing ruthenium mono(2,2′‐bipyridine) carbonyl complexes Ru(dmbpy)(CO) 2 X 2 (dmbpy = 4,4′‐dimethyl‐2,2′‐bipyridine), as well as effective reagents for the attack of the Ru–Ru bond in the dimer [Ru(dmbpy)(CO) 2 Cl] 2 . Selective syntheses were established for both cis ‐ and trans ‐halogen complexes in the case of Cl‐ and of Br‐containing derivatives, but the only stable isomer containing iodine was trans (I)‐Ru(dmbpy)(CO) 2 I 2 . The failure to obtain the cis isomer was probably due to sterical effects. Furthermore, a novel S ‐bound trans (SCN) analogue was synthesized and structurally characterized. In all experiments, the reaction conditions selected led to complete halogen exchange; no mixed halogen or pseudohalogen complexes were detected.