Bis-π-cyclopentadienylmolybdenum-(π-bismethanethiolato)-bis-π-allylrhodium hexafluorophosphate

Abstract

Abstract. C18H26MoRhS2PF6, monoclinic, P21/b , M= 650"3, a=8.23 (2), b=17-71 (3), c=15.33 (3) A, ~,= 96.5 (2)°; De= 1.95 g cm -3 for Z=4. Patterson methods were used to determine the structure from visually estimated photographic X-ray intensities. The trial structure was refined by least-squares to a final R of 0.098. The deviations from the expected values in bond lengths and angles were not significant. The molecules do not have an intramolecular metal-metal bond.

Enthalpies of formation of complexes [M(η-C5H5)2(SR)2](M = Mo, W, or Ti; R = C3H7, C4H9, or C6H5); metal–sulphur bond enthalpies

“…It may be noted that in several similar complexes containing a benzene ring (see Table 6 and also ref. 26) the carbon-carbon distances in the ring are quite constant and close to the same values in the benzene Carbon-sulphur bond lengths are also approximately constant in those complexes. All this suggests that the error induced by the previous assumption will not have a dramatic effect on the value of E(Ti-S), the same being probably true in the case of the remaining thiolatocomplexes.…”

Synthesis and Structure of a Five-Coordinate Organochromium(III) Thiolate Complex from a Chromium(II) Alkyl Precursor

“…22 Examples of bridging chromium thiolates include [CpCr(CO) 2 (SPh)] 2 and [CpCr(SPh)] 2 S, 7 Cp 2 Cr 2 (µ-SPh)(µ 3 -S) 2 FeCp and CpCr(µ-SPh) 3 Fe(µ-SPh) 3 -CrCp, 23 and Cp 2 W(µ-SPh)Cr(CO) 4 . 24 However, the solution magnetic moment of 2 (Evans' method 25,26 µ B was consistent with a mononuclear high-spin Cr(III) complex; this value remained unchanged as the temperature was reduced to -78 °C. The mass spectrum indicated only a monomer fragment at m/e 689 (M + -Me), and the 1 H NMR spectrum consisted of a series of very broad, paramagnetically shifted resonances from which no structural information could be ascertained.…”

Syntheses and reactivities of hydrosulfido- or sulfido-bridged heterobimetallic complexes containing Group 6 and Group 9 metals

“…The Mo ؒ ؒ ؒ Rh distance at 3.671(1) Å indicates the absence of any bonding interactions between the formal 18-electron Mo and 16-electron Rh centers. As a related Mo/Rh complex with bridging thiolato ligands, [Cp 2 Mo(µ-S-Me) 2 Rh(C 3 H 5 ) 2 ][PF 6 ] has been reported, 15 in which the dihedral The Mo-S bond lengths of 2.510(3) and 2.521(3) Å are slightly longer than the Rh-S bond distances at 2.362(3) and 2.390(3) Å. Two SH protons could be found in the Fourier map; as depicted in Fig.…”