307351-75-3Relevant academic research and scientific papers
Reactions of cis and trans beat, aryl osmium complexes (cat == l,2-O2CeH4). Bis(bcat) complexes of osmium and ruthenium and a structural comparison ofcis and trans isomers of Os(Bcat)I(CO)2(PPh3)2
Rickard, Clifton E.F.,Roper, Warren R.,Williamson, Alex,James Wright
, p. 4344 - 4355 (2008/10/08)
Reaction of Os(Bcat)Cl(CO)(PPh3)2 (1) (HBcat = catecholborane or 1,3,2-benzodioxaborole) with o-tolyllithium gives the yellow,; five-coordinate Beat, aryl complex Os(Bcat)(o-tolyl)(CO)(PPh3)2 (2). Treatment of 2 with carbon monoxide or p-tolylisocyanide gives the corresponding saturated Beat, aryl complexes cis-Os(Bcat)(o-tolyl)(CO)2(PPh3)2 (3) and c/sOs(Bcat)(o-tolyl)(CO)(CN-p-tolyl)(PPh3)2 (4). Complexes 3 and 4 decompose in benzene solution at room temperature to give o-tolylBcat and the orthometalated triphenylphosphine complexes Os(c5lJph2)H(CO)2(PPh3) (5) and Os(C6H4PPh2)H(CO)(CN-p-tolyl)(PPh3) (as a mixture of two isomers, 6a and 6b), respectively. In the presence of B2cat2, 3 and 4 react to give the bis(Bcat) complexes Os(Bcat)2(CO)2(PPh3)2 (7) and Os(Bcat)2(CO)(CN-p-tolyl)(PPh3)2 (8). Complex 3 also reacts with HBcat to produce Os(Bcat)H(CO)2(PPh3)2 (9). The bis(Bcat) ruthenium complexes Ru(Bcat)2(CO)2(PPh3)2 (10) and Ru(Bcat)2(CO)(CN-tolyl)(PPh3)2 (11) can be prepared by treatment of Ru(CO)2(PPh3)3 or Ru(CO)(CN-p-tolyl)(PPh3)3 with B2cat2. Complex 3 reacts with C12C=CC12 or CHC13 to produce OsCl(CCl=CCl2)(CO)2(PPh3)2 (12) or OsCl2(CO)2(PPh3)2, respectively. Complex 1 when treated with CO gives cis-Os(Bcat)Cl(CO)2(PPh3)2 (13), which in turn with phenyllithium or o-tolyllithium gives ￡rans-Os(Bcat)(Ph)(CO)2(PPh3)2 (14) orrans-Os(Bcat)(o-tolylXCO)2(PPh3)2 (15). Complex 15 reacts with I2 to give a mixture of ra7i$-Os(Bcat)I(CO)2(PPh3)2 (16) and rans-Os(o-tolyl)I(CO)2(PPh3)2 (17). Complex 16 is also formed by heating cts-Os(Bcat)I(CO)2(PPh3)2 (18) in benzene. Crystal structures of complexes, 5, 8,10, 11, 12, 16, and 18 are reported.
