Molecular structure of .mu.-pyrazole-bis(.eta.5-cyclopentadienyl)titanium(III), a dimeric titanium(III) compound with a bridging organic group

Fieselmann, B.; Stucky, Galen D.

doi:10.1021/ic50186a008

Cited by 59 publications

(19 citation statements)

References 13 publications

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“…Setting angles of 12 reflections (9) 0.12469 (4) 0.14225 (7) 0.08896 (8) 0.12204 (4) 0.34460 (7) 0.1921 (3) 0.1886 (2) 0.4534 (3) 0.2059 14) 0.2025 12) 0.0836 (4) -0.0590 (3) 0.1716 (2) 0.0482 (3) -0.0794 (3) 0.2201 (7) 0.2242 (7) -0.0051 (7) -0. ( 1) (2) 118(1) 0(4)-C(6)-C( 7) 117 (1) 0(2)-C( l)'-C(2)' 118.7 (4) " Angles cdkulated from restrained distances in the least-squares refinement; the numbers in parentheses do not represent true error. (5) 0.0058 (6) 0.106 (2) 0.070 (2) 0.2797 (7) 0.409 (1) 0.4954 (6) 0.5341 (8) 0.2654 (7) 0.3999 (9) -0.159 (1) 0.00692 (4) 0.1580 (1) 0.1749 (3) 0.2132 (4) 0.3337 (5) 0.342 (1) 0.320 (1) 0.4554 (8) 0.3289 (6) 0.4338 (7) 0.1742 (6) 0.2164 (9) 0.0917 (7) 0.1545 (9) -0.1189 (1) -0.1559 (3) 0.02587 (4) 0.2444 (1) -0.1881 (1) 0.1587 (4) -0.1 106 (3) 0.1750 (5) 0.2720 (6) 0.396 (1) 0.345 (2) 0.179 (1) -0.1855 (8) -0.291 (1) -0.1685 (7) -0.0076 (9) -0.3803 (6) -0.5073 (8) chloride in a trans-influence series in Mo(I1) chemistry.…”

Section: Molybdenum(ii) (A)mentioning

confidence: 99%

Stereochemistry of bis(carboxylato)dichlorobis(tertiary phosphine)dimolybdenum complexes. Crystal and molecular structure of two isomers of Mo2(O2CCMe3)2Cl2(PEt3)2

Areniyar¹,

Mainz²,

Ruben³

et al. 1982

Inorg. Chem.

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Inorg. Chem. 1982,and melts at 208-210 OC. 'H NMR (26 "C, benzene-d6): 6 2.12 (s, C5Me5). Resonances due to coordinated pyridine were not observed. Anal. Calcd for (&HNN2Yb: C, 59.9; H, 6.70; N, 4.66. Found: C, 60.3; H, 6.70; N, 4.47. IR (Nujol): 3092 w, 3063 w, 3037 w, 2720 w, 1594 s, 1486 w, 1213 m, 1159 m, 1107 w, 1069 m, 1033 m, 998 m, 984 w, 942 w, 886 w, 800 w, 759 s, 729 w, 702 s, 662 m, 618 m, 591 m, and 419 m cm-I. X-ray Data. Crystals of the complex were sealed in quartz capillaries under an atmosphere of argon. A crystal of dimensions 0.06 X 0.22 X 0.22 mm was examined with a Picker FACS-I automated diffractometer equipped with a raphite monochromator and a Mo setting angles of 12 manually centered reflections (45O C 28 < 50°) gave a = 16.092 (6) A, b = 9.883 (4) A, c = 17.872 (7) A, = 98.46 (3)O, and V = 281 1.4 A3 at 21 (1) OC. The observed extinctions are unique to space group P2,/c. For Z = 4 and a molecular weight of 601.70, the calculated density is 1.42 gIntensity data for two forms (&h,+k,=U) to 50° in 28 were collected with 8-28 with a scan speed of 2O/min on 28. Three standard reflections, measured after every 150 reflections, decreased in intensity by 2% during data collection, and the measured intensities were corrected accordingly.An analytical absorption correction was appliedS ( p = 33.3 cm-I), and the correction factors were varied from 1.27 to 2.42. Intensities of the 10699 reflections measured were also adjusted for the Lorentz and polarization factors: extinctions were removed, and equivalent reflection were averaged to obtain a set of 4985 unique reflections.Trial coordinates for the ytterbium atom were obtained from a three-dimensional Patterson function and were refined by least squares.An electron density map then revealed all nonhydrogen atoms. In the final cycles of least-squares refinement, all nonhydrogen atoms were refined anisotropically with the pyridine hydrogen atoms included in their calculated positions (with the assumption of a C-H bond X-ray tube (X(Kal) = 0.709 30 1 ). Least-squares refinement of the ( 5 ) Templeton, L. K.; Templeton, D. H. "Abstracts, American Crystallo-

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Section: Molybdenum(ii) (A)mentioning

confidence: 99%

Stereochemistry of bis(carboxylato)dichlorobis(tertiary phosphine)dimolybdenum complexes. Crystal and molecular structure of two isomers of Mo2(O2CCMe3)2Cl2(PEt3)2

Areniyar¹,

Mainz²,

Ruben³

et al. 1982

Inorg. Chem.

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“…The ligating properties of bridging pyrazolyl groups have been reviewed by Trofimenko (3) and recent reports reflecting the current interest in this type of bridging system have included novel q 5-cyclopentadienyl compounds of titanium (4,5) and nickel (6), binuclear complexes involving palladium and platinum (7), and mono-, bi-, and trinuclear gold derivatives (8). The present paper describes the synthesis of a series of "16-electron" nickel nitrosyl complexes and details their selective acceptor properties towards electron donor molecules.…”

Section: Introductionmentioning

confidence: 99%

Neutral pyrazolyl-bridged nickel nitrosyl complexes. Synthesis, structure, and reactivity

Chong¹,

Rettig²,

Storr³

et al. 1979

Can. J. Chem.

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. Can. J. Chem. 57, 3090 (1979).A series of neutral pyrazolyl-bridged nickel nitrosyl complexes, [LNi(NO)], (where L = pyrazolyl, N2C3H3; 3,5-dimethylpyrazolyl, N,C5H7; or 3,5-di-tert-butylpyrazolyl, N2Cll-HI,), is described. The nickel atoms are susceptible to nucleophilic attack and the reactivity of the dimers with neutral donor ligands is reported. In addition to the dimeric molecules a novel trimetallic nickel compound [(ON)Ni(N2C5H7)2]2Ni has also been isolated. Introduction In our continuing study of pyrazolyl-based ligands (1, 2) our attention has recently been focused on a series of pyrazolyl metal nitrosyl compounds containing bridging bidentate pyrazolyl moieties. The ligating properties of bridging pyrazolyl groups have been reviewed by Trofimenko (3) and recent reports reflecting the current interest in this type of bridging

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“…[4] The bonding in [Ti(h 2 -R 2 pz) 4 ] contrasts the expected d-block bridging bidentate coordination seen in [{TiCp 2 (m-pz)} 2 ]. [5] The homoleptic complexes 1 and 2 are of considerable interest as molecular precursors for chemical vapor deposition (CVD). [1,2] In his seminal review of pyrazole and pyrazolate coordination, Trofimenko considered two possible types of bonding for the pyrazolate ion: bridging [that is, exo-bidentate (I)] or h 5 (the pyrazolate functions as 1,2-diazacyclopentadienide).…”

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confidence: 99%

Another Surprise from Pyrazolate Ligands

Cosgriff

Deacon

1998

Angewandte Chemie International Edition

106

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Molecular structure of .mu.-pyrazole-bis(.eta.5-cyclopentadienyl)titanium(III), a dimeric titanium(III) compound with a bridging organic group

Cited by 59 publications

References 13 publications

Stereochemistry of bis(carboxylato)dichlorobis(tertiary phosphine)dimolybdenum complexes. Crystal and molecular structure of two isomers of Mo2(O2CCMe3)2Cl2(PEt3)2

Stereochemistry of bis(carboxylato)dichlorobis(tertiary phosphine)dimolybdenum complexes. Crystal and molecular structure of two isomers of Mo2(O2CCMe3)2Cl2(PEt3)2

Neutral pyrazolyl-bridged nickel nitrosyl complexes. Synthesis, structure, and reactivity

Another Surprise from Pyrazolate Ligands

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