Synthesis and Crystal Structures of the Novel Tetrameric Nitrido Complexes [{cyclo-ReN}4(S2CNEt2)6(MeOH)2(PPh3)2][BPh4]2 · CH2Cl2 · 2 H2O and [{cyclo-ReN}4(S2CNEt2)4Cl4(PMe2Ph)4] · 2 acetone

✍ Scribed by D. V. Griffiths; S. J. Parrott; M. Togrou; J. R. Dilworth; Yifan Zheng; S. Ritter; U. Abram

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: German
• Weight: 141 KB
• Volume: 624
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(199809)624:9<1409::aid-zaac1409>3.0.co;2-k

✦ Synopsis

Novel tetrameric rhenium(V) complexes have been prepared from [ReNCl 2 (PPh 3 ) 2 ] and [ReN(PMe 2 Ph) (S 2 CNEt) 2 ], respectively. [ReNCl 2 (PPh 3 ) 2 ] reacts with 1.5 equivalents of KS 2 CNEt 2 in methanol to yield the unusual dark red species [{cyclo-ReN} 4 (S 2 CNEt 2

. The crystal structure of the tetramer (triclinic, space group P1, a = 13.842( 2), b = 15.213(2), c = 16.796(3) A Ê , α = 67.88(1), b = 70.90(1), c = 88.05(1)°, U = 3080.2(8) A Ê 3 , Z = 1) shows four rhenium atoms in a square configuration which are bridged via linear asymmetric Re≡N±Re groups with bond lengths of about 169 and 203 pm. The molecule contains a centre of symmetry with two distinct octahedral rhenium environments. The first rhenium environment contains two bidentate dithiocarbamate ligands which complete the octahedral geometry and the second contains a bidentate dithiocarbamate ligand, coordinated methanol and has retained a single phosphine coligand.