Nitrosyl complexes of molybdenum and tungsten. Part 15. Iodo(monoalkylamido)nitrosyl[tris(3,5-dimethylpyrazolyl)borato]molybdenum complexes, some related tungsten compounds, and the crystal and molecular structure of ethylamido(iodo)nitrosyl[tris(3,5-dimethyl-pyrazolyl) borato]molybdenum

The reactions of acetone and of diacetone alcohol with [Mo{HB(3,5-Me2C3HN2)3}(NO)I2]. The formation of [Mo{HB(3,5-Me2C3HN2)3}(NO)I(OEt)] and the structures of [{Mo[HB(3,5-Me2C3HN2)3](NO)I}2O] and a bicyclic salt [C6H3Me5N2(OH)][I½(I3)½]

“…The White and Red Organic Salts, (1) and (3).-The nature of these species was established primarily by a single-crystal X-ray analysis of the red salt, (3). This was identified as containing a bicyclic cation, [C6H3Me5N2(OH)J+ and a 1 : 1 mixture of Iand 13-.…”

Molybdenum and tungsten nitrosyl complexes containing bulky alkoxy, aryloxy, and arylamido ligands: their electrochemical behaviour and the structure of [Mo{HB(Me2pz)3}(NO)I(OCH2CH2CH2Br)]

“…data. C18H28BBrIMON,02, M = 687.98 (crystallises from dichloromethane as small, very dark green, irregular bricks), crystal dimensions 0.20 x 0.12 x 0.20 mm, monoclinic, a = 8.069 (3), b = 15.453 (7), with an excess of the appropriate amine, phenol, or alcohol (analytical data are given in Table 2). With the amines a l : 2 mol ratio was usually a sufficient excess to effect a reasonable yield.…”

Nitrosyl complexes of molybdenum and tungsten. Part 17. Hydrazido(1–) complexes of [tris(3,5-dimethylpyrazolyl)borato]molybdenum, related tungsten compounds, and the structures of NN-dimethylhydrazido(1–)- and N-methyl-N-phenylhydrazido(1–)iodo(nitrosyl)[tris(3,5-dimethylpyrazol-1-yl)borato]molybdenum

“…The two molybdenum-nitrogen bond lengths differ markedly and although this difference may simply reflect the associated high estimated standard deviations, particularly in the methylphenylhydrazido-complex, a contributing factor may be an apparently greater x-donor capacity of this methylphenylhydrazidoligand, as evidenced by its extended x-electron delocalisation. A 1 68.9 (7) 99.5 (8) 179.0 (12) 95. * The geometry of pyrazolyl ring N(2), N(3), C( 1)-C(5) of the methylphenylhydrazido-complex was constrained during refinement.…”