
M. J. Gerald LesleySouthern Connecticut State University | SCSU · Department of Chemistry
M. J. Gerald Lesley
PhD
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February 1999 - August 1999
February 1997 - February 1999
August 1996 - February 1997
Publications
Publications (43)
The title compound, C26H22O6, is formed as the major product from the reaction between syn-1,2-bis(pinacolatoboron)-1,2-bis(4-methylcarboxyphenyl)ethene and excess methyl 4-iodobenzoate in basic DMSO using a palladium catalyst at 80°C via Suzuki coupling followed by protodeboronation. Crystals were grown by slow evaporation of a hexanes sol...
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
In the crystal structure of the title compound, C28H44B2N2O2, the square-planar B2N2 ring is slightly puckered. One of the thexyl groups exhibits disorder over two positions. The site occupancies for the disordered thexyl groups refined to 0.611 (4) and 0.389 (4).
The continued and evolving significance of boron chemistry to the wider chemical community is demonstrated by the international and interdisciplinary nature of the research reported in this book. Contemporary Boron Chemistry encompasses inorganic and organic compounds as well as polymers, solid-state materials, medicinal aspects and theoretical stu...
Hydrolysis of diborane(4) compounds including B2(NMe2)4 and the amine adduct [B2Cl4(NHMe2)2] affords either diboronic acid, B2(OH)4, or the borinane species B4O2(OH)4. A crystal structure of the latter species, which co-crystallises with two equivalents of [NH2Me2]Cl, is described and compared with a previously reported polymorph of the same materi...
The title compound, C18H14N2S2, crystallizes as a pseudo-merohedral twin, with four independent molecules in the asymmetric unit. The compound shows a combination of π-interactions and close-packing, with the planar maleonitrile and phenyl groups extending into pockets of neighbouring molecules.
The structure of 1,1′-dibromoferrocene, [Fe(C5H4Br)2], has been determined by single-crystal X-ray diffraction at 100 K. The two Br substituents are eclipsed in the solid state, with a Br⋯Br distance of 3.6172 (6) Å.
The structure of p-anisolecarbonitrile, C8H7NO, was determined by single-crystal X-ray diffraction at 100 K. It crystallizes in the monoclinic space group P21/c with two crystallographically independent molecules in the asymmetric unit.
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
The reaction between 1,2-B2Cl2(NMe2)2 and disodium catecholate Na2[1,2-O2C6H4] affords the cyclic diborane(4) compound
1,2-B2(NMe2)2(cat) (cat=1,2-O2C6H4), whereas a similar reaction using dilithium thiocatecholate Li2[1,2-S2C6H4] affords the 1,1-isomer 1,1-B2(NMe2)2(thiocat)
(thiocat=1,2-S2C6H4). Both compounds can be used
to prepare unsymmetric d...
At present, there is considerable interest in the use of metallocene or lanthanocene complexes as initiators of polymerization of acrylate-based monomers. This article discusses the observations using Cp-amido complexes of zirconium as initiators for methyl methacrylate (MMA) polymerization.
The platinum catalysed diboration of alkynes using the diborane(4) compound 1,2-B2Cl2(NMe2)2 affords high yields of cyclic 1-azonia-2-borata-5-borole compounds, which arise from redistribution of B–Cl and B–NMe2 bonds.
In the crystal structures of the three title complexes, (benzene-1,2-diolato-O,O')bis( triphenylphosphine)platinum(II), [Pt(C6H3O2)(C18H15P)(2)], (1), (benzene-1,2-dithiolato-S,S')bis( triphenylphosphine)platinum(II), [Pt(C6H4S2)(C18H15P)(2)], (2), and the n-hexane hemisolvate of (benzene-1,2-diolato-O,O')bis(tricyclohexylphosphine)platinum(II), [P...
The synthesis and X-ray crystal structure of the [4]ferrocenophane compound [1,2-B2(NMe2)2{1,1′-(SC5H4)2Fe}] which contains a B–B bond are described. The ferrocene-1,1′-dithiolate group bridges the B–B bond of the diborane(4) unit [B–B 1.709(9) Å] in a 1,2- fashion. Each boron centre is trigonal planar, the angle between these planes being 82.0° su...
The reaction between the platinum(II) bis(boryl) complex cis-[Pt(PPh3)2(Bcat)2] (cat = 1,2-O2C6H4) and the tertiary phosphines PMe3, PEt3, PMe2Ph, PMePh2 and dcpe [1,2-bis(dicyclohexylphosphino)ethane] and the phosphite P(OEt)3 afforded the new complexes cis-[Pt(PR3)2(Bcat)2] (PR3 = PMe3, PEt3, PMe2Ph or PMePh2), cis-[Pt(dcpe)(Bcat)2] and cis-[Pt{P...
A series of neutral pyridyl adducts involving the strong Lewis acids BF3 and B(C6F5)3 has been prepared, and their second-order nonlinear optical coefficients (EFISH method) have been examined. The formation of the pyridyl−boron bond leads to enhancement of the dipole moments and second-order NLO coefficients (β and β(0)). Reactions of DMAP (4-Me2N...
The synthesis and spectroscopic characterisation of the new diborane(4) compounds B-2(1,2-O2C6Cl4)(2) and B-2(1,2-O2C6Br4)(2) are reported together with the diborane(4) bis-amine adduct [B-2(calix)(NHMe2)(2)] (calix = Bu(t)calix[4]arene). B-B bond oxidative addition reactions between the platinum(0) compound [Pt(PPh3)(2)(eta-C2H4)] and the diborane...
The synthesis and spectroscopic characterisation of the new diborane(4) compounds B2(1,2-O2C6Cl4)2 and B2(1,2-O2C6Br4)2 are reported together with the diborane(4) bis-amine adduct [B2(calix)(NHMe2)2] (calix=Butcalix[4]arene). B–B bond oxidative addition reactions between the platinum(0) compound [Pt(PPh3)2(η-C2H4)] and the diborane(4) compounds B2(...
The synthesis and characterization of a series of bis-catecholate diborane(4) compounds, B2(1,2-O2C6H4)2 (3), B2(1,2-O2-4-MeC6H3)2 (7), B2(1,2-O2-4-MeC6H3)2 (7), B3(1,2-O2-4-ButC6H3) 2 (8), B2(1,2-O2-3,5-Bu2tC 6H2)2 (9), B2(1,2-O2-3-MeOC6H3)2 (10), bis-dithiocatecholate diborane(4) compounds, B2(1,2-S2C6H4)2 (13), B2(1,2-S2-4-MeC6H3)2 (14), and tet...
Diborane(4) compounds react with α,β-unsaturated ketones to give the 1,4-addition product in the presence of a platinum catalyst at 80 °C.
A series of unsymmetric pi-donor-acceptor (D/A) bis(phenylethynyl)benzenes was prepared in a two-step sequence via Pd/Cu catalyzed cross-coupling reactions of 1,4-diiodobenzene and the corresponding 4-p-R-phenylethynes. Related unsymmetric D/A platinum trans-bis(acetylide) complexes were also prepared in a stepwise fashion. An investigation of thei...
The reactions of the BB-bonded compounds B2(cat)2 (cat = 1,2-O2C6H4) (1a), B2(4-Butcat)2 (1b), and B2(OCMe2CMe2O)2 (1c) with the Pt(0)-bis(phosphine) complex [(PPh3)2Pt(η-C2H4)] (4) via oxidative addition of the BB bond yield cis-bis(boryl) Pt(II) complexes. The molecular structures of cis-[(PPh3)2Pt(Bcat)2]·C6D6 (3a) and cis-[(PPh3)2Pt(B-4-Butcat)...
The title compound, 2,2'-(2,3-dimethyl-2,3-butanediyldioxy)bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolane, C18H36B2O6, B(2)pin(3), has two trigonal planar B atoms, each chelated by one pinacolato group, linked by a third pinacolate. The molecule is centrosymmetric, with an exactly anti conformation for the bridging pinacolate, and the two Bpin five-me...
The title compound, (Z)-1,2-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2-bis(4-methoxyphenyl)ethene, C28H38B2O6, has a cis arrangement of two boronate ester substituents and two 4-methoxyphenyl substituents on its central C=C double bond, which shows a slight twist of ca 8.5 degrees. All four substituents are rotated considerably out of the...
Both (Z)-1,2-bis(1,3,2-benzodioxaborolan-2-yl)-1,2-bis(4-methylphenyl)ethene [(I), C28H22B2O4] and (Z)-4-[1,2-bis(1,3,2-benzodioxaborolan-2-yl)vinyl]benzonitrile [(II), C21H13B2NO4] have a cis arrangement of two boronate ester substituents on a C=C double bond, which shows a slight twist to relieve steric crowding of the substituents. The interplay...
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and...
Rigid-rod shaped materials are of interest due to their propensity to form liquid crystalline phases. In addition, if these molecules allow electronic communication along their backbone, they can also exhibit linear optical properties such as luminescence as well as second- and/or third-order nonlinear optical properties. We have employed a palladi...
The B-B-bonded compounds B-2(1,2-O2C6H4)(2) (1a), B-2(1,2-O-2-4-Bu(t)C(6)H(3))(2) (1b), B-2- (1,2-O-2-3,5-Bu(t)C(6)H(2))(2) (1c), and B-2(OCH(2)CMe(2)CH(2)O)(2) (1e) have been prepared, and the crystal structures of 1a-c are reported. Compounds 1a-c react rapidly at room temperature under stoichiometric conditions with either [(PPh(3))(2)Rh(mu-Cl)]...
A series of symmetric 1, 4-bis(p-R-phenylethynyl)benzenes (6a-h) have been prepared via Pd11/Cu1 catalyzed cross- coupling of 1, 4-diiodobenzene (5) and p-substituted phenylethynes (4a-h). Similarly, the unsymmetric analogues (9a-c) were obtained from 1-iodo-4-(p-nitrophenylethynyl)benzene (8) and p-substituted phenylethynes (4c, 4d, 4g). Quantitat...
31P CP/MAS NMR spectra were recorded for a series of eight linear mono-, bi-, and trimetallic bis(tri-n-butylphosphine) nickel and palladium complexes having 1,4-tetrafluorophenylene bridges. A2 type spectra were obtained with Ni(PBu3)2(1,4-C6F4H)2 (I), Pd(PBu3)2(1,4-C6F2) (V) and [Pd(PBu3)2(1,4-C6F4H)]2(1,4-C6F4) (VII). AB type spectra were obtain...
Transition metal acetylide complexes represent a class of linear conjugated molecules which can exhibit both second- and third-order optical nonlinearities. We have prepared several classes of such complexes including both symmetrically (X = Y) and unsymmetrically (X ≠ Y) substituted bis(acetylide) complexes trans-[Pt(PMe2Ph)2 (C≡C-X)(C≡C-Y)]. Comp...