Octahedral ruthenium(II) complexes cis,cis-[RuX2(CNR)(CO)(P∧P)] and cis,cis,cis-[RuX2(CO)2(P∧P)] (X = Cl, Br; P∧P = 1,1′-bis(diphenylphosphino)ferrocene, 1,1′-bis(diisopropylphosphino)ferrocene): Synthesis and catalytic applications in transfer hydrogenation of acetophenone and cycloisomerization of