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Öğe 1,4-diferrocenylbutane-1,4-dione(Blackwell Publishing, 2008) Tombul, Mustafa; Bulut, Adnan; Guven, Kutalmis; Buyukgungor, OrhanIn the crystal structure of the title compound, [Fe-2(C5H5)(2)-(C14H12O2)], each carbonyl group is coplanar with the adjacent cyclopentadienyl ring, thus maximizing the pi-orbital overlap and electronic interactions between the groups. In the crystal structure, there are inter-and intramolecular C-H center dot center dot center dot O contacts.Öğe Alkyl Lewis Acid Catalyzed Syntheses of Dicarbonyl Ferrocenes(Asian Journal Of Chemistry, 2010) Tombul, Mustafa; Gemici, S.; Bulut, AdnanA series of diferrocenoyl compounds; succinyl (1), glutaryl (2), adipoyl (3), suberoyl (4) and sebacoyl ferrocene (5) were synthesized from the reaction of ferrocene with EtAlCl(2). Compared to the conventional methods reported in the literature, the yields obtained from these reactions are found to be higher than the typical catalyst.Öğe catena-Poly[[diaquarubidium(I)](mu(2)-3-carboxypyrazine-2-carboxylato)(mu(2)-pyrazine-2,3-dicarboxylic acid)](Wiley-Blackwell, 2009) Tombul, Mustafa; Güven, KutalmışThe structural unit of the title compound, [Rb(C6H3N2O4)-(C6H4N2O4)(H2O)(2)](n), consists of one rubidium cation, one hydrogen pyrazine-2,3-dicarboxylate anion, one pyrazine-2,3-dicarboxylic acid molecule and two water molecules. This formulation is repeated twice in the asymmetric unit as the rubidium cation lies on an inversion centre. Each anion or acid molecule is linked to two rubidium cations, while the rubidium cation has close contacts to four symmetry-equivalent organic ligands, with two different coordination modes towards this cation. In addition, each rubidium cation is coordinated by two water O atoms, raising the coordination number to eight. One of the carboxyl groups of the acid holds its H atom, which forms a hydrogen bond to a coordinated water molecule. The other carboxyl group is deprotonated in half of the ligands and protonated in the other half, taking part in a strong O-H center dot center dot center dot O hydrogen bond disordered over an inversion centre. The stabilization of the crystal structure is further assisted by O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.Öğe Crystal structure of dimethylammonium bis(naphthalene-2,3-diolato) borate, C22H20BNO4(Walter De Gruyter Gmbh, 2018) Tombul, Mustafa; Guven, Kutalmis; Bulut, Adnan; Svoboda, Ingrid; Fuess, HartmutC22H20BNO4, monoclinic, C2/c (no. 15), a = 32.303(4) angstrom, b = 8.2703(6) angstrom, c = 7.3876(6) angstrom, beta = 92.889(8)degrees, V = 1971.1(3) angstrom(3), Z = 4, R-gt(F) = 0.0978, wR(ref)(F-2) = 0.2063, T = 298 K.Öğe Crystal structure of pyridinium bis(naphthalane2,3-diolato-κ 2O,O′)borate monohydrate, C25H20BNO5(Walter De Gruyter Gmbh, 2017) Tombul, Mustafa; Guven, Kutalmis; Svoboda, Ingrid; Fuess, HartmutC25H20BNO5, triclinic, P (1) over bar (no. 2), a = 7.0868(6)angstrom, b = 10.3522(6)angstrom, c = 15.3140(10)angstrom, alpha= 74.088(7)degrees, beta= 89.996(7)degrees, gamma = 79.190(1)degrees, V = 1059.71(13)angstrom(3), Z = 2, R-gt(F) = 0.0445, wR(ref)(F-2) = 0.1105, T = 298 K.Öğe Crystal Structure of Tertiarybutyl Ammonium Bis[(naphthalene-2,3-diolato)borate] Dimethyl Sulfoxide Solvate(Japan Soc Analytical Chemistry, 2019) Tombul, MustafaThe structure of tertiarybutyl ammonium bis[naphthalene-2,3-diolato)borate] dimethyl sulfoxide solvate was determined by X-Ray crystallography. The compound crystallized in a triclinic system, and was characterized to be in the space group P-1, with cell parameters a = 9.6282(9)angstrom, b = 11.0221(9)angstrom, c = 13.0273(12)angstrom, alpha = 91.050(4)(0), beta = 109.419(4)(0), gamma = 94.574(2)(0), Z = 2, and V = 1298.2(2)angstrom(3). The crystal packing is governed by intermolecular and intramolecular N-H center dot center dot center dot O hydrogen bonds. The B atom takes a distorted tetrahedral geometry with four O atoms of naphthalene-2,3-diolato ligands.Öğe Dimethylammonium bis(3-oxido-naphthalene-2-carboxylato)borate hemihydrate(Wiley-Blackwell, 2008) Tombul, Mustafa; Guven, Kutalmis; Svoboda, IngridThe title compound, C2H8N+center dot C(22)H(12)BO6(-)center dot 0.5H(2)O, was synthesized under atmospheric conditions in the presence of dimethylformamide acting as a template. The structure is composed of [NH2(CH3)2](+) cations, bis(3-oxidonaphthalene-2-carboxylato) borate anions and water molecules. The water molecule lies on a twofold rotation axis. The stabilization of the crystal structure comes from electrostatic interactions and is assisted by intermolecular O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds between the layers.Öğe Dipotassium maleate with boric acid(Blackwell Publishing, 2007) Tombul, Mustafa; Güven, Kutalmış; Büyükgüngör, Orhan; Aktaş, Huseyin; Durlu, Tahsin NuriIn the title compound, poly[(mu(3)-boric acid)-mu(4)-maleato-dipotassium], [K-2(C4H2O4){B(OH)(3)}](n), there are two independent K+ cations, one bonded to seven O atoms ( three from boric acid and four from maleate), and the other eight-coordinate via three boric acid and four maleate O atoms and a weak eta(1)-type coordination to the C = C bond of the maleate central C atoms. Hydrogen bonding links the boric acid ligands and maleate dianions, completing the packing structure.Öğe Poly[[diaquacaesium(I)]bis(μ 3 -3-carboxypyrazine-2-carboxylato)](Int Union Crystallography, 2007) Tombul, Mustafa; Güven, Kutalmış; Büyükgüngör, OrhanThe asymmetric unit of the title compound, [Cs(C6H3N2O4)(2)(H2O)(2)](n), contains one Cs-I cation on an inversion centre, one 3-carboxypyrazine-2-carboxylate anion and one water molecule. In the crystal structure, each anion is linked to three cations, while each cation is surrounded by six of the anions. In addition, each cation is coordinated by two water O atoms, raising the coordination number to ten. In the crystal structure, intermolecular O - H center dot center dot center dot O and O - H center dot center dot center dot N hydrogen bonds contribute to the stabilization of the structure.Öğe Poly[[diaquacaesium(II)]bis(μ3-3-carboxypyrazine-2-carboxylato)]. Corrigendum(Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Buyukgungor, Orhan…Öğe Poly[diaqua(μ2-3-carboxypyrazine2-carboxylato)(μ2-pyrazine-2,3-dicarboxylic acid)potassium(I)](Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Svoboda, IngridThe structural unit of the title compound, [K(C6H3N2O4)(C6H4N2O4)(H2O)(2)](n), consists of one potassium cation, one hydrogen pyrazine-2,3-dicarboxylate anion, one pyrazine-2,3dicarboxylic acid molecule and two water molecules; this is twice the asymmetric unit, since the potassium cation lies on an inversion centre. Each anion or acid molecule is linked to two potassium cations, while the potassium cation has contacts to four symmetry-equivalent organic ligands, with two different coordination modes towards this cation. In addition, each potassium cation is coordinated by two water O atoms, raising the coordination number to eight. One of the carboxyl groups of the acid retains its H atom, which forms a hydrogen bond to a coordinated water molecule. The other carboxyl group is deprotonated in half of the ligands and protonated in the other half, taking part in a strong O-H center dot center dot center dot O hydrogen bond disordered over an inversion centre. The stabilization of the crystal structure is further assisted by O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds in which water acts as the donor.Öğe Poly[triaquabis-(μ(2)-3-carboxy-pyrazine-2-carboxyl-ato)dilithium(I)](Blackwell Publishing, 2008) Tombul, Mustafa; Guven, Kutalmis; Buyukgungor, OrhanIn the title compound, [Li-2(C6H3N2O4)(2)(H2O)(3)](n), the coordination number for both independent Li+ cations is five. One of the Li+ ions has a distorted trigonal-bipyramidal geometry, coordinated by one of the carboxyl O atoms of a 3-carboxypyrazine-2-carboxylate ligand, two O atoms from two water molecules, and an N and a carboxylate O atom of a second 3-carboxypyrazine-2-carboxylate ligand. The other Li+ ion also has a distorted trigonal-bipyramidal geometry, coordinated by one water molecule and two 3-carboxypyrazine-2-carboxylate ligands through an N and a carboxylate O atom from each. One of the carboxyl groups of the two ligands takes part in an intramolecular O-H center dot center dot center dot O hydrogen bond. The stabilization of the crystal structure is further assisted by O-H center dot center dot center dot O, O-H center dot center dot center dot N and C-H center dot center dot center dot O hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.Öğe Poly[μ-aqua-diaqua(μ2-pyrazine-2,3-dicarboxylato)dilithium(I)](Wiley-Blackwell, 2009) Tombul, Mustafa; Guven, KutalmisThe asymmetric unit of the title compound, [Li-2(C6H2N2O4)(H2O)(3)](n), consists of two independent Li+ cations, one pyrazine-2,3-dicarboxylate dianion and three water molecules. One of the Li+ cations has a distorted tetrahedral geometry, coordinated by one of the carboxylate O atoms of the pyrazine-2,3-dicarboxylate ligand and three O atoms from three water molecules, whereas the other Li+ cation has a distorted trigonal-bipyramidal geometry, coordinated by a carboxylate O atom of a symmetry-related pyrazine-2,3-dicarboxylate ligand, two water molecules and a chelating pyrazine-2,3-dicarboxylate ligand (by utilizing both N and O atoms) of an adjacent molecule. The synthesis of a hydrated polymeric dinuclear lithium complex formed with two pyrazine-2,3-dicarboxylic acid ligands has been reported previously [Tombul et al. (2008a). Acta Cryst. E64, m491-m492]. By comparision to the complex reported here, the dinuclear complex formed with two pyrazine-2,3-dicarboxylic acid ligands differs in the coordination geometry of both Li atoms. The crystal structure further features O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen-bonding interactions involving the water molecules and carboxylate O atoms.Öğe A Sodium Supported Borate Ester: Synthesis, Spectral Characterization and Crystal Structure of dimeric Sodium Organoborate Complex [Na(py)][B(hyncaH22)2]2(Springer/Plenum Publishers, 2009) Tombul, Mustafa; Guven, Kutalmis; Durlu, Tahsin N.A dimeric sodium supported borate complex, [Na(py)][B(hyncaH(-2))(2)](2) (1) (py = pyridine, hynca = 1-hydroxynaphthalene-2-carboxylic acid), has been synthesised by the reaction of NaBH4 with two equivalents of hynca in anhydrous THF and following crystallization from py/H2O solution afforded borate ester derivative. The complex has been fully characterized by FT-IR in the solid state and by NMR (H-1 and C-13) spectroscopy and electrospray ionization mass spectrometry in solution. The molecular structure of the title compound was determined by single crystal X-ray diffraction. Structure analysis of complex 1 confirmed the presence of an anionic complex [B(hyncaH(-2))(2)](-) in which boron atom is coordinated simultaneously by two hynca ligands utilising both alkoxide and carboxylate groups for bonding. The Na atom is six- coordinate to five O atoms of hydroxy carboxylic acid and one pyridine N atom. Crystal data: crystal system, monoclinic, a = 10.971(3) angstrom, b = 6.839(3) angstrom, c = 30.545(5) angstrom, beta = 92.20(2)degrees, space group P2(1)/c (#14), V = 2,290( 1) angstrom(3), Z = 4.Öğe Synthesis and biological activity of ferrocenyl furoyl derivatives(Taylor & Francis Inc, 2017) Tombul, Mustafa; Bulut, Adnan; Turk, Mustafa; Ucar, Busra; Isilar, OzerDue to the fact that ferrocene and furan derivatives have long been known to be one of the most biologically active compounds, preparation of their new derivatives might serve a very important purpose. Herein, five furoyl ferrocenes were synthesized via EAS reaction utilizing AlCl3-EtAlCl2 Lewis acids. The compounds 1-5 were obtained in moderate yields and characterized by IR, H-1-NMR, C-13-NMR, and mass spectrometry. Although toxicity increases with concentration, at 100 mu g/mL concentration, the protection of cell viability was observed to be 70% level. At 50 mg/mL concentration, apoptosis in cancer cells observed was 63 +/- 4% leading to high apoptosis ratio for the compound 3. For the compounds (1-5), the necrotic effects were found to be between 21% and 39% at 50 mu g/mL concentration.Öğe Synthesis and Crystal Structure Determination of a Dimeric Complex of Dimethylammoniumbis(p-tert-butylcatecholato) borate(JAPAN SOC ANALYTICAL CHEMISTRY, 2020) Tombul, Mustafa; Biyikoglu, Mutluhan; Bulut, Adnan; Guven, Kutahms; Isilar, OzerThe structure of a dimeric complex, namely dimethylammoniumbis{(p-tert-butylcatecholato) borate}, was determined by X-ray crystallography. The compound crystallized in a triclinic system, and was characterized to be in the space group P-1, with cell parameters a = 11.929(7)angstrom, b = 16.833(6)angstrom, c = 11.259(11)angstrom, alpha = 93.75(5)degrees, beta = 91.00(7)degrees, gamma = 100.37(4)degrees, Z = 4, and V = 2218(3)angstrom(3). The crystal packing is conducted by intermolecular/intramolecular N-H-O hydrogen bonds. The B atom adopts a distorted tetrahedral geometry with four O atoms of p-tert-butylcatechol ligands.Öğe Tetrakis(μ3-phenoxo-acetonitrilelithium), a tetrameric lithium aryloxide with a cubane core(Int Union Crystallography, 2003) Tombul, Mustafa; Errington, R. John; Coxall, Robert A.; Clegg, WilliamThe title compound, (CH3CNLiOC6H5)(4) or [Li-4 (C6H5O)(4) (C2H3N)(4)], is tetrameric with a distorted Li4O4 cube core. The molecule has crystallographic (4) over bar symmetry. Each Li atom has distorted tetrahedral coordination, with bonds to three triply bridging phenoxo ligands and a terminal acetonitrile ligand derived from the solvent in the synthesis.Öğe Unprecedented Formation of Potassium Borate Based Carbonate from Chloral Hydrate, Potassium Carbonate and Boric Acid(Japan Soc Analytical Chemistry, 2021) Tombul, Mustafa; Turkmenoglu, Elmas; Shin, OnurThe structure of the reaction product of boric acid, chloral hydrate, and potassium carbonate in H2O, potassium bis(carbonato)borate hydrate K[B(CO2-mu-O-CO2)(2)]center dot 2H(2)O, was determined by X-ray crystallography. The compound crystallized in the orthorhombic system, and was characterized to be in the space group Aba2, with cell parameters of a = 11.0579(10)angstrom, b = 11.1695(10)A, c = 9.0504(9)angstrom, Z = 4, and V = 1117.83(18)angstrom(3). In the crystal structure, intermolecular O-H center dot center dot center dot O hydrogen bonds link the molecules into a supramolecular structure, in which they may be effective in stabilizing the structure. The B atom espouses a distorted tetrahedral geometry with four O atoms of carbonate ligands.Öğe Yeni Şeker-Ferrosenil İmin Sentezleri ve Aldehitlere Asimetrik Etil Katılmasında Katalizör Olarak Uygulaması(2016) Bulut, Adnan; Tombul, MustafaSaf kiral bilesikler organik kimyada, ilaç sanayisinde ve materyal biliminde çok önemlidirler. Literatu?rde kiral madde sentezleri için birkaç yöntem vardır. Bunlardan bir tanesi kiral ligand kullanımıdır. Kiral schiff bazları en çok kullanılan ligandlardan birisidir. Bu projede yeni schiff bazları sentezlenmis ve yapıları spektroskopik metotlar ile aydınlatılmıstır. Bu kiral iminler, ilk defa ferrosen, seker ve imin birimlerini içermektedir. Sentezlenen kiral iminler bir çok asimetrik tepkimelerde katalizör olarak test edilebilir. Bu çalısmada kiral iminler benzaldehite asimetrik dietilçinko katılmasında katalizör olarak test edilmistir. Ne yazıkki henu?z u?ru?n elde edilememistir. Fakat farklı reaksiyon sartlarında denemelerimiz devam ettirmekteyiz.
