WorldCat Identities

Churchill, Melvyn R.

Overview
Works: 23 works in 23 publications in 1 language and 23 library holdings
Publication Timeline
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Most widely held works by Melvyn R Churchill
PREPARATION AND CRYSTALLOGRAPHIC CHARACTERIZATION OF THE (B9C2H11-Co-B8C2H10-Co-B8C2H10-Co-B9C2H11( -3)) ANIONS: A SYSTEM WITH FOUR FUSED ICOSAHEDRA( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

The complex (B9C2H11-Co-B8C2H10-Co-B8C2H10-Co-B9C2H11( -3)) has been prepared and its crystallographic characterization is discussed. (Author)
Synthesis and Characterization of Mesitylgallium Chloride Compounds Including the Crystal and Molecular Structure of Dichloromesitylgallium (III), an Inorganic Polymer( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

The mesitylgallium chloride compounds, GaMes2Cl and GaMesCl2, have been prepared and fully characterized by melting point data, elemental analyses, solubility properties, IR and Hydrogen 1 and Carbon 13 NMR spectroscopic data and Lewis acidity studies. Cryoscopic molecular weight studies of GaMes2Cl in benzene solution are consistent with the presence of dimeric molecules. Lewis bases such as Ethylene Oxide and Tetrahydrofuran (THF) react with (GaMes2Cl)2 in benzene to establish two equilibria which are consistent with the presence of the dimer, a monochloride bridged 2:1 adduct ((GaMes2Cl)2-base) and the 1:1 adduct. The dichloro derivative GaMesCl2 is an unusually high melting solid which is insoluble in hydrocarbon solvents and crystallizes in the centrosymmetric monoclinic space group. Dichloromesitylgallium(III) is a one-dimensional polymer in which planar Ga(mesityl)Cl units are linked by bridging chloride ligands
Methylene Bridged Group 13-15 Compounds, R2MCH2PPh2 (R = CH2CMe3, CH2SiMe3 ; M = Ga, In). Crystal Structure of ((Me3CCH2)2InCH2PPh2)2.C6D6, a Molecule Containing an In-C-P-In-C-P Ring in a Chair Conformation( Book )

1 edition published in 1991 in English and held by 1 WorldCat member library worldwide

A series of compounds of the type R2MCH2PPh2 (R = CH2CMe3, CH2SiMe3; M = Ga, In) have been prepared by metathetical reactions between the appropriate diorganometal halide and LiCH2PPH2 in pentane or Et2O at -78 C. All compounds were characterized by physical properties, partial elemental analyses (C, H), cryoscopic molecular weight measurements in benzene solution as well as IR, H NMR and P NMR spectroscopic data. All appropriate data support the existence of dimeric molecules. The monomeric species dimerize by apparent Lewis acid-base interactions. These interactions are sufficiently strong that the compounds do not form stable adducts with oxygen- or nitrogen-containing Lewis bases
Synthesis, Characterization and Crystal and Molecular Structure of Tricyclopentadienylgallium(III)( Book )

1 edition published in 1986 in English and held by 1 WorldCat member library worldwide

The compound trimesitylgallium(III) (GaMes3) has been prepared and fully characterized by elemental analysis, IR and 1H NMR data, Lewis acid-base studies and an X-ray structural study. Trimesitylgallium(III) crystallizes in the centrosymmetric trigonal space group P3 (No. 147) with a=13.415(4)A, c= 7.628(2)A and rho(calc'd) = 1.9 g/cc for mol. wt. 427.3 and Z=2. Single crystal X-ray diffraction data (Mo K alpha, 2 theta = 4.0-40.0 deg) were collected with a Syntex P2 sub 1 automated four-circle diffractometer. All atoms (including hydrogen atoms) were located and the structure was refined to R sub F = 3.9% and R sub wF= 3.3% for all 743 unique reflections (none rejected). The gallium (III) atom lies on a site of crystallographically-imposed C3 symmetry (and approximate D3 symmetry) and has a trigonal planar stereochemistry (C(1)-Ga-C(1') = 119.93(16)degs) with a gallium-carbon bond length of 1.968(4)A. The aromatic rings of the mesityl ligands form a propeller-like arrangement about gallium with an angle of 55.9 degs between each ring and the metal coordination plane
THE REACTION OF B9C2H13 WITH ALUMINUM TRIALKYLS: SYNTHESIS OF B9C2H12AlR2 AND B9C2H11 AlR COMPLEXES WITH CRYSTALLOGRAPHIC CHARACTERIZATION OF B9C2H11Al(C2H5)( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

The reaction of B9C2H13 with aluminum trialkyls has led to the synthesis of B9C2H12AlR2 and B9C2H11AlR complexes, R = methyl and ethyl. The crystallographic characterization of B9C2H11Al(C2H5) is presented. (Author)
The Synthesis, Characterization and Structural Studies of In(C5H4Me) by X-Ray Diffraction and Electron Diffraction Techniques and a Reinvestigation of the Crystalline State of In(C5H5) by X-Ray Diffraction Studies( Book )

1 edition published in 1987 in English and held by 1 WorldCat member library worldwide

The compound In(C5H4Me) has been prepared from InC1 and Li(C5H4Me) in diethyl ether and fully characterized according to its physical and solubility properties, reaction with dilute HC1, a cryoscopic molecular weight study in cyclohexane, infrared and 1H NMR spectroscopic properties, an X ray structural study and a gas-phase electron diffraction study. In addition, a quantitative X ray structural study has been used to reinvestigate the nature of the solid state of In(C5H5). The compound In(C5H4Me) crystallizes in the centrosymmetric space group P21/n (N0. 14var) with a = 6.1636(14), b = 11.5684(17), c = 9.1723(15)A, beta = 103.561(15), V = 635.78(19)A3 and Z = 4. Organoindium chemistry, Indium compounds, Chemistry, X ray structural studies, Electron diffraction studies, Cyclopentadienyl
Chemistry of Organoindium Hydrides. The Synthesis, Characterization and Crystal Structure of K(H(In(CH2CMe3)3)2)( Book )

1 edition published in 1992 in English and held by 1 WorldCat member library worldwide

Two new organoindium hydrides have been prepared and fully characterized according to their physical properties, partial elemental analyses, molecular weight studies and IR and 1H and 13C NMR spectral studies. The unique hydrogen atoms bonded to indium in the two compounds provide characteristic infrared bands and 1H NMR resonances which have been identified by comparative studies with the corresponding deuterium derivatives. Compounds which contain indium hydrogen bonds are difficult to prepare, isolate and fully characterize. Thus, no indium hydride has been fully characterized previously by elemental analyses, molecular weight studies, diagnostic spectroscopic data and an X-ray structural study
Pentamethylcyclopentadienyl-indium(I) and -Indium(III) Compounds--Syntheses, Reactivities and X-Ray Diffraction and Electron Diffraction Studies of In(C5Me5)( Book )

1 edition published in 1988 in English and held by 1 WorldCat member library worldwide

The golden yellow compound In(C5Me5) has been prepared in only 62% yield from InC1 and Li(C5Me5) in diethyl ether and fully characterized according to its physical and solubility properties, its reaction with dilute aqueous HC1, a cryoscopic molecular weight study in cyclohexane, IR and 1H NMR spectroscopic properties, a single crystal X ray diffraction study and a gas phase electron diffraction study. The other products of this reaction have been identified as In(C5Me5)2C1, indium metal and (C5Me5)2 in 5.0, 21 and 2.5% yields, respectively. Keywords: Indium, Cyclopentadienyl-indium(I) chemistry, Pentamethylcyclopentadienyl compounds, X ray structural study, Electron diffraction study. (MJM)
Synthesis and Crystal and Molecular Structure of In(C5Me5)-An Apparent Octahedral Cluster( Book )

1 edition published in 1986 in English and held by 1 WorldCat member library worldwide

The new compound In(C5Me5) has been prepared and characterized by an X-ray structural study as an octahedral cluster. This new indium(I) compound is a golden yellow, volatile crystalling solid at room temperature. An X-ray structural study demonstrates that the compound crystallizes in the rhombohedral space group R3 (C superscript 2 sub 3i;No. 148) with unit cell parameters (hexagonal setting) a=20.182(4), c=13.436(3)angstrom, V-4739(2)angstrom and Z=18. The structure refined to R sub F=3.6% and R sub wF=3.3% for all 1870 unique data. The crystal consists of an octahedral cluster (In(C5Me5)6) with indium atoms on the interior and eta 5 -C5Me5 units on the exterior. All pentamethylcyclopentadienyl rings exhibit eta 5-coordination to indium but the 'centroid' indium vectors do not point toward the center of the hexaindium cluster as in other main-group clusters
The Dihydronaphthalene Elimination Reaction as a Route to Gallium-Nitrogen Compounds. Crystal and Molecular Structure of (PhMe2CCH2)2GaNHPh2( )

1 edition published in 1998 in English and held by 0 WorldCat member libraries worldwide

The dihydronaphthalene derivative Na2?C10H8Ga(CH2CMe2Ph)2Cl2Z reacts at room temperature with NH3, n-PrNH2 and PhNH2 in THF solution to form high yields of (PhMe2CCH2)2GaNHR2 (R = H, n-Pr and Ph), C10H10 and NaCl. In contrast, the elimination reactions between Ga(CH2CMe2Ph)3 with these same amines to form (PhMe2CCH2)2GaNHR2 and PhCMe3 require temperatures of 150 deg C. The cyclopentadiene elimination reaction between (PhMe2CCH2)2Ga(C5H5) and aniline occurs at -10 deg C and is the fastest of these three. An X-ray structural study of (PhMe2CCH2)2GaNHPh2 identified it as the trans isomer
Gallium-Nitrogen Compounds Prepared by Dihydronaphthalene Structures of (PhMe2CCH2GaNH(t-Bu)2 and(H4C6)Me2CCH2GaNH(t-Bu)2Ga(CH2CMe2Ph)2( )

1 edition published in 1998 in English and held by 0 WorldCat member libraries worldwide

The dihydronaphthalene elimination reaction between Na2C10H8(GaR2Cl)2 (R = CH2CMe3, CH2CMe2Ph) and t-BuNH2 provided a room temperature route to R2GaNH(t-Bu)2. However, when Ga(CH2CMe2Ph)3 and t-BuNH2 were reacted at 140 - 150C, C6H5CMe3 was eliminated and the product was (H4C6)Me2CCH2GaNH(t-Bu)2Ga(CH2CMe2Ph)2, a gallium(III) amide with one GaC4 metallocyclic ring, rather than (PhMe2CCH2)2GaNH(t- Bu)2. X-ray structural studies confirmed the identity of this novel compound as well as that of the typical dimer. When the reaction temperature was increased to 210 - 230C, the product was (H4C6)Me2CCH2GaNH(t-Bu)2GaCH2CMe2(C6H4), a species with two GaC4 metallocyclic rings
An Organoindium Compound Containing an Indium-Selenium Bond: Synthesis, Properties and Molecular Structure of [(Me3CCH2)2InSePh]2( )

1 edition published in 1992 in English and held by 0 WorldCat member libraries worldwide

An organoindium compound with a In-Se bond, has been synthesized, characterized by elemental analyses, IR, 1H NMR and 13 C NMR spectroscopies, cryoscopic molecular weight studies and an X-ray structural study. The dimeric molecule crystallizes in the centrosymmetric monoclinic space-group P21/c (No, 14). Diffraction data were collected on a Siemens R3m/V automated four circle diffractometer, and the structure was solved and refined. The four-membered In2Se2 ring has a butterfly arrangement with the phenyl groups in the anti position relative to the ring. The In-C (neopentyl) distances range from 2. 135(11) to 2.168(10) while In-Se bond distances range from 2.748(1) to 2.756(1). There is some rotational disorder of the methyl groups within (at least) one of the neopentyl ( -CH2 CMe3) groups
Indium Compounds Which Contain Two Different Organic Substituents. Crystal Structure of (In(CH2CMe3)(CH2SiMe3)Cl)2, An Interesting Case of Partial Ligand Disorder in the Solid State( )

1 edition published in 1991 in English and held by 0 WorldCat member libraries worldwide

Three new indium compounds which contain two different organic substituents, In(CH2CMe3)(CH2SiMe3)Cl, In(CH2CMe3)(C6H5)Cl, and (Me3CCH2) (Me3SiCH2)InPEt2 have been prepared, purified and characterized. All compounds were characterized by partial elemental analysis (C, H and P as appropriate), cryoscopic molecular weight studies in benzene solution as well as NMR and IR spectroscopic studies. All compounds exist as dimeric molecules in solution. NMR spectral data were consistent with the presence of mixtures of cis and trans isomers in solution
Synthesis, Characterization and Molecular Structure of a Compound with a Ring of Group 13, 15 and 16 Atoms (Me3CCH2)2InP(t-Bu)2In(CH2CMe3)2SePh( )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

The compound (Me3CCH2)2InP(t-Bu)2In(CH2CMe3)2SePh has been prepared from equimolar quantities of (Me3CCH2)2InP(t-Bu)22 and (Me3CCH2)2InSePh2 in pentane solution, recrystallized and fully characterized. This mixed-bridge organoindium species crystallized in the centrosymmetric space group P(bar)1 (No. 2) with a gamma 10.069(2)A, b = 11.627(4)A, c = 18.452(4)A, alpha = 100. 74(2)deg, Beta = 99.33(2), gamma = 103.38(2)deg, V = 2016.9(8)A(svp)3, and Z = 2
Room Temperature Cyclopentadiene Elimination Reaction for the Synthesis of Diethylgallium-Amides, -Phosphides and -Thiolates, Crystal and Molecular Structures of Et2GaP(t-Bu)22 and Et2GaS(SiPh3)2( )

1 edition published in 1996 in English and held by 0 WorldCat member libraries worldwide

The compounds Et2GaNEt22, Et2GaN(H)(Me)2, Et2GaN(H)(t-Bu)2, Et2GaP(i-Pr)22, Et2GaP(t-Bu)22, and Et2GaS(SiPh3)2 have been prepared in high yields at room temperature by the elimination of cyclopentadiene from Et2Ga(C5H5) and the corresponding amine, phosphine or thiol. The three diethylgallium amides and Et2GaP(i-Pr)22 are liquids whereas the other phosphide and the thiolate are crystalline solids at room temperature. All compounds were fully characterized by elemental analyses, (1)H and (31)P NMR spectroscopy and cryoscopic molecular weight studies in benzene, as appropriate and are dimeric in solution. The crystalline compounds Et2GaP(t-Bu)22 and Et2GaS(SiPh3)2 were characterized by X-ray structural studies. Even though Et2GaN(H)(t-Bu)2 and Et2GaS(SiPh3)2 were prepared at room temperature and isolated in high yield, (1)H NMR studies revealed that neither compound was formed in high yield in solution. Removal of the cyclopentadiene by either dimerization or distillation, and/or dimerization the gallium product are necessary to prevent the back reaction to reform the reactants
Use of Organoindium Hydrides for the Preparation of Organoindium Phosphides. Synthesis and Molecular Structure of (Me3CCH2)2InP(t-Bu)22( )

1 edition published in 1994 in English and held by 0 WorldCat member libraries worldwide

The indium phosphide (Me3CCH2)2InP(t-Bu)22 has been prepared from KIn(CH2CMe3)3H and ClP(t-Bu)2 in pentane. When In(CH2CMe3)3 and HP(t-Bu)2 were present in a 1:1 mol ratio, heating to 105-115 deg C for 5 days was required, whereas when ln(CH2CMe3)3 and HP(t-Bu)2 were in a 5:1 mol ratio in pentane solution, large, colorless crystal of the desired indium product formed in 6 days at room temperature Excess phosphine, In(CH2CMe3)3 and HP(t-Bu)2 in a 1:5 mol ratio in pentane, significantly retarded the rate of formation of (Me3CCH2) 2InP(t-Bu)22. Thermal decomposition of (Me3CCH2)2InP(t-Bu)22 to form InP occurred at 245 deg C in 1 h. The compound (Me3CCH2)2InP(t-Bu)22 crystallizes in the centrosymmetric orthorhombic space group Pbcn (No. 60) with a = 11.742(3)A, b = 20.194(6)A, c = 17.909(4)A, V = 4246 (2) A3 and Z = 4. Indium-phosphorus compounds, Indium-hydrides, Single-source precursor, X-Ray structural study
Synthesis Characterization and X-Ray Structural Study of a Dinuclear Organoindium Phosphide Complex with Two Different Phosphide Moieties (Me3CCH2)2InP(t-Bu)2 In(CH2CMe3)2PPh2( )

1 edition published in 1996 in English and held by 0 WorldCat member libraries worldwide

An organoindium phosphide which incorporates two phosphido moieties in the same molecule (Me3CCH2)2InP(t-Bu)2In(CH2CMe3)2PPh2, 1, has been synthesized in good yield from (Me3CCH2)2InP(t-Bu)22 and (Me3CCH2)2InPPh2 in pentane solution and fully characterized. The compound exists as a single compound in the solid state according to an X-ray structural study but is in equilibrium with the starting compounds in benzene solution according to (1)H and (31)P NMR spectral data. p1
Diphenylphosphide Derivatives of Bisneopentyl-Gallium and -Indium. Crystal and Molecular Structures of ((Me3CCH2)2GaPPh2)2 and ((Me3CCH2)2InPPh2)3( )

1 edition published in 1991 in English and held by 0 WorldCat member libraries worldwide

The two compounds, (Me3CCH2) 2MPPh2 (M=Ga, In) have been prepared by metathetical reactions between (Me3CCH2)2MCl and KPPh2 and fully characterized. The characterization data include elemental analyses (C, H), melting points, IR, H and P NMR spectral studies, cryoscopic molecular weight studies in benzene solution and single crystal X-ray structural studies. The gallium compound exists as a dimer in benzene solution and in the solid state
Syntheses, Characterization, Crystal and Molecular Structures and Solution Properties of Et2Ga(C5H5) and EtGa(C5H5) 2( )

1 edition published in 1995 in English and held by 0 WorldCat member libraries worldwide

The compounds Et2Ga(C5H5) and EtGa(C5H5)2 have been prepared by ligand redistribution reactions in pentane solution between appropriate quantities of GaEt3 and Ga(C5H5)3. Both compounds have been fully characterized by elemental analyses, X-ray structural studies, cryoscopic molecular weight studies in benzene solution, mass spectroscopic studies, 1H NMR studies of solutions and 1H NMR studies of the melts. Both compounds exist as pure single compounds in the solid state. jg
Diorganogallium Beta-Diketonates and Their Lewis Acid-Base Adducts. Crystal and Molecular Structures of Mes2Ga(hfac) and Me2Ga(hfac). NC5H5( )

1 edition published in 1998 in English and held by 0 WorldCat member libraries worldwide

Compounds of the type R2Ga(bdk) (R=Me, Et, Mes (mesityl); bdk=2,4-pentanedionato-(acac), 1,1,1,-trifluoro-2,4-pentanedionato-(tfac), 1,1,1,5,5,5,-hexafluoro-2,4-pentanedionato-(hfac), 2,2,6,6,-tetramethyl-3,5-heptanedionato-(tmhd) have been prepared by multiple routes including hydrocarbon elimination, metathesis and ligand redistribution reactions and fully characterized by elemental analyses, cryoscopic molecular weight studies in benzene, and IR and multinuclear NMR spectroscopic studies. An X-ray structural study of Mes2Ga(hfac) demonstrated four coordinate gallium with sigma bonds to the two mesityl rings and to the two oxygen atoms of the beta-diketonate derivatives toward NMe3 and/or pyridine were also investigated
 
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English (20)