99143-36-9Relevant academic research and scientific papers
Novel 2-Aza-allylidene Complexes: Synthesis and X-Ray Structure of trans-Br(CO)4W
Fischer, Helmut,Seitz, Friedrich,Riede, Juergen
, p. 537 - 539 (1985)
The replacement of the trans-CO group by Br(1-) in cationic AlBr4 complexes causes a drastic change in the geometry of the CNCR2 ligand; the molecular structure of the phenyl-substituted product, trans-Br(CO)4W, is established by single crystal X-ray diffraction.
Metallaheterocumulenes, IV - 2-Azaallylidene Complexes - Novel Compounds with a Bent CNCR2 Fragment as Complex Ligand
Fischer, Helmut,Seitz, Friedrich,Riede, Juergen
, p. 2080 - 2093 (2007/10/02)
(2-Azoniaallenylidene)pentacarbonyltungsten tetrabromoaluminate complexes +AlBr4- (2-AlBr4) (CR2 = C(C6H4Br-4)2 (a), CPh2 (b), C(C6H4OMe-4)2 (c), C(C6H4)2O (d), C(2,4,6-C6H2Me3)2 (e)) whichare synthesized by the reaction of (CO)5W (1) with AlBr3, react with freshly distilled tetrahydrofuran to give neutral trans-bromo(2-azaallylidene) complexes trans-Br(CO)4W(CNCR2) (3) and small amounts of (CO)5W-CN-2-NC-W(CO)5 (4).The compounds 4 correspond to the product of a reductive dimerization of two cations 2.If 1b (or the corresponding methoxy compound 5) reacts with BBr3 instead of AlBr3/THF, 4b is the main product.The spectroscopic data of 3 and the results of an X-ray analysis of 3b show that the replacement of a CO ligand in the cations 2 by Br- with formation of 3 results in a drastic change of the bonding situation within the CNCR2 ligand. 3a - e are the first compounds in which a strongly bent CNCR2 fragment functions as a complex ligand.The aminocarbyne complex trans-Br(CO)4WCNPh2 (7) was synthesized by BBr3-induced fragmentation of (CO)5W (6).
