Reaktionen von Azidocobalt(III)‐Chelatkomplexen mit Isocyaniden

Abstract

Azidochelatcobalt(I1I)-Verbindungen Reactions of Azidocobalt(I11) Chelate Complexes with lsocyanidesAzidochelatecobalt(Il1) complexes N,Co(chelate)B (la -e) [chelate = e. g. dianion of N,N '-0-phenylenebis(salicyldenimine), B = PPhJ react with organic isocyanides to give metal-carbon bonded tetrazolate complexes 3, 4. 2-lsocyanoethanol affords tetrazolato-(9. 10) or azidooxazolidin-2-ylidene complexes (ll), depending on the nature of the solvent, the trans-base B, and the chelate ligand. The mechanism of formation of C-coordinated tetrazoles from azido complexes and isonitriles is discussed.

Microwave synthesis of bis(tetrazolato)-PdII complexes with PPh3 and water-soluble 1,3,5-triaza-7-phosphaadamantane (PTA). The first example of C–CN bond cleavage of propionitrile by a PdII Centre

“…The trans arrangement of the two tetrazolato ligands appears to be the most favourable one, in contrast to the previous reports [21,22,25], as clearly established by X-ray diffraction analysis. Different linkage isomers, on account of the ambidentate character of the tetrazolato ligand that can coordinate by either the N 1 or the N 2 mode, have been spectroscopically detected in solution, but the resolved crystal structure of complex 3b shows that, in the solid state, the mode of tetrazolato binding is through the N 2 atom.…”

Synthesis of arene ruthenium triazolato complexes by cycloaddition of the corresponding arene ruthenium azido complexes with activated alkynes or with fumaronitrile

“…Calc. for C 23 This complex was prepared by adopting a similar method as described in the preparation of (13) using the compound (6) instead of (4). Yield: 77% (85 mg, 0.185 mmol).…”

“…In analogy, a coordinated azide group in metal complexes can also undergo such cycloaddition reactions [6]. Azido complexes undergo [3+2] cycloaddition reactions with nitriles [7][8][9][10][11][12][13][14][15][16][17][18][19] and isonitriles [7,8,[20][21][22][23] to produce tetrazolato complexes. Similar reactions with alkynes produce triazolates complexes [12,[24][25][26]; alkenes, however, react very slowly and mostly afforded mixture of products [8,12].…”

Metallkomplexe funktioneller Isocyanide, XI. Homoleptische Carbenkomplexe, II. Tetrakis(oxazolidin‐2‐yliden)‐ und Tetrakis(perhydrooxazin‐2‐yliden)nickel, ‐palladium und ‐platin

“…4111 (2) HI3 734 (27) H14A -1055 (31) H148 300 (27) H15A -1 4 5 8 0 1 ) H15B -2857 (21) H23 3223 (38) H24A 4826 (34) H24 E 5684 (27) H25 A 4048 (37) H25 B 4682 (44) 1226(0) -2968 (1) 596 (3) 2196 (1) 388 (2) 509 (7) 1675 (1) -353 (2) 351 (7) 2378 (1) -1244 (2) 508 (9) 3566(2) -1124 (2) 636 (12) 3416(2) -35(3) 623 (13) .425 (2) 2507 (2) 421 (7) 489 (2) 1054 (2) 350 (7) 9OO(l) 481 (2) 390 (7) 1251 (2) 1586 (3) 340 (8) 851 (2) 2983 (3) 422 (10) 2174 (21) -1917 (25) 3835 (21) -2121 (21) 4 1 2 2 ( 1 9 ) -707 (30) 3867 (21) 881 (22) 3455 (22) - 393(28) 1028 (26) -531 (20) 2097 (15) 1522 (34) 835 (22) 1389 (34) 1492 (20) 3677 (30) 185 …”