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4-(Dimethyl-amino)phenyl ethynyl telluride.

ABSTRACT: The title compound, C(10)H(11)NTe, is the first organyl ethynyl telluride, R-Te-C C-H, to be structurally characterized. In the L-shaped mol-ecule, the aryl moiety, viz. Me(2)NC(6)H(4)Te, is almost perpendicular to the Te-C C-H fragment. The Te-Csp(2) bond [2.115 (3) Å] is significantly longer than the Te-Csp bond [2.041 (4) Å]. The Te-C C group is approximately linear [Te-C-C = 178.5 (4)° and C C = 1.161 (5) Å], while the coordination at the Te atom is angular [C-Te-C = 95.92 (14)°]. In the crystal structure, there are Csp-H⋯N hydrogen bonds which are perpendicular to the CNMe(2) group; the N atom displays some degree of pyramidalization. Centrosymmetrically related pairs of mol-ecules are linked by Te⋯π(ar-yl) inter-actions, with Te⋯Cg = 3.683 (4) Å and Csp-Te⋯Cg = 159.1 (2)° (Cg is the centroid of the benzene ring). These inter-actions lead to the formation of zigzag ribbons which run along c and are approximately parallel to (110).

SUBMITTER: Farran J

PROVIDER: S-EPMC2968982 | biostudies-literature |

REPOSITORIES: biostudies-literature

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2-(Dimethyl-amino-meth-yl)phenyl phenyl telluride.

Project description:The title compound, C(15)H(17)NTe, is a heteroleptic Te, N-bidentate ligand having a short Te?N contact [2.8079?(16)?Å] involving a secondary bonding inter-action between the amino N and Te(II) atoms. The Te-C bond [2.136?(2)?Å] trans to the amino group is slightly elongated compared to the other Te-C bond [2.1242?(18)?Å] due to the hypervalent inter-action. The bond angle for the trans N-Te-C atoms [164.92?(6)°] deviates significantly from linearity.

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4-(Dimethyl-amino)phenyl phenyl ketone.

Project description:In the crystal structure of the title compound, C(15)H(15)NO, the two benzene rings are twisted from each other by a dihedral angle of 47.97 (4)°. The crystal structure is stabilized by weak inter-molecular C-H⋯O and C-H⋯π inter-actions, and π-π inter-actions with a centroid-centroid distance of 3.8493 (5) Å are observed.

| S-EPMC2962007 | biostudies-literature

2-{[4-(Dimethyl-amino)-benzyl-idene]amino}-phenyl disulfide.

Project description:In the title mol-ecule, C(30)H(30)N(4)S(2), the two benzene rings connected through the disulfide chain form a dihedral angle of 88.7 (1)°, and the two benzene rings in the benzyl-ideneaniline fragments form dihedral angles of 34.0 (1) and 35.4 (1)°. The crystal packing exhibits no significantly short inter-molecular contacts.

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4,4'-Bis(dimethyl-amino)benzhydryl phenyl sulfone.

Project description:In the title compound, C(23)H(26)N(2)O(2)S, the sulfur-bound phenyl group is aligned approximately parallel to one of the two rings of the benzhydryl group, making a dihedral angle of 1.15 (9)°. The other forms a dihedral angle of 59.20 (9)° with the phenyl group bound to the S atom. In the crystal, mol-ecules are linked into strands along [100] by weak C-H⋯O contacts. Weak C-H⋯π inter-actions are also observed.

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S-2-Amino-5-(dimethyl-ammonio)phenyl sulfothio-ate.

Project description:The title compound, C(8)H(12)N(2)O(3)S(2), has been isolated as an inter-mediate in the synthesis of methyl-ene blue dye, the best known phenothia-zine dye, and structurally characterized as a zwitterion. The crystal structure is dominated by inter-molecular N-H⋯O hydrogen bonds between the amine and sulfothio-ate groups, with graph-set motif C(9)R(2) (2)(8), involving anti-parallel chains and a centrosymmetric eight-membered ring. A hydrogen bond with graph-set motif R(2) (2)(14) between the ammonium and sulfothio-ate groups completes the two-dimensional network in the ab plane. Inter-molecular C-H⋯O hydrogen bonds are also present in the crystal.

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4-Ethynyl-N,N-di-phenyl-aniline.

Project description:The asymmetric unit of the title compound, C20H15N, comprises two crystallographically independent mol-ecules (A and B). In each mol-ecule, the N atom adopts an approximately trigonal planar geometry, lying 0.009?(1) or 0.003?(1)?Å from the plane defined by the C atoms of the aromatic substituents to which it is attached. In the crystal, mol-ecules are linked via C-H?? inter-actions, forming a three-dimensional structure.

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Dibromidochlorido{2-[(dimethyl-amino)-meth-yl]phenyl-?N,C}tellurium(IV).

Project description:The title compound, C(9)H(13)Br(2)ClNTe, was synthesized by reacting [2-(dimethyl-amino-meth-yl)phen-yl]tellurium(II) chlor-ide with Br(2). As a consequence, the Cl and Br atoms are not well ordered but distributed over the three possible positions such that the overall stiochiometry is two Br atoms and one Cl atom. The scrambling of the Br and Cl atoms indicates a small energy barrier for the exchange process between the apical and equatorial positions. Overall, the Te atom geometry is slightly distorted square pyramidal (? = 0.052 for the major component). However, there is a weak secondary inter-action between the Te atoms and the disordered Br/Cl atoms of a nearby mol-ecule. The Te-Br and Te-Cl distances in both disorder components fall into two groups; a longer distance for the Br/Cl involved in this secondary inter-action [2.6945?(17)?Å for Br and 2.601?(9)Å for Cl] and shorter bond distances to the remaining halogen atoms, indicating that this inter-action has slightly weakened the Te-X bond, as is the case in the previously reported tribromido structure [Singh et al. (1990). J. Chem. Soc. Dalton Trans. pp. 907-913]. Otherwise, the metrical parameters in the two structures are not significantly different. An intermolecular C-H?Br interaction occurs.

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4-(Dimethyl-amino)pyridinium 2-(4-hydroxy-phenyl-diazen-yl)benzoate.

Project description:In the title molecular salt, C(7)H(11)N(2) (+)·C(13)H(9)N(2)O(3) (-), the dihedral angle between the benzene rings in the anion is 35.14 (8)°. In the crystal, centrosymmetrically related anions associate via hydrox-yl-carboxyl-ate O-H⋯O hydrogen bonds, resulting in a 24-membered {⋯OC(3)N(2)C(4)OH}(2) synthon. The cations are associated with this dimeric unit via pyridinium-carboxyl-ate N-H⋯O hydrogen bonds. Weak C-H⋯O links further consolidate the packing, generating layers.

| S-EPMC2971943 | biostudies-literature

Practical Synthesis of Ethynyl(phenyl)-?3-Iodane Using Calcium Carbide as an Ethynyl Group Source.

Project description:Stannylation of calcium carbide followed by Sn-hypervalent iodine(III) exchange reaction cleanly afforded the electrophilic ethynylating agent ethynyl(phenyl)-?3-iodane in high yield. This two-step method uses very inexpensive materials and is readily operable without any special precautions.

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4-{[(E)-(3,5-Dimethyl-1-phenyl-1H-pyrazol-4-yl)methyl-idene]amino}-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one.

Project description:The title Schiff base compound, C(23)H(23)N(5)O, was synthesized by the reaction of 4-amino-phenazone and 3,5-dimethyl-1-phenyl-pyrazole-4-carbaxaldehyde. The mol-ecule adopts an E configuration about the central C=N double bond. A weak intra-molecular C-H?O hydrogen bond generates an S(6) ring motif. The dihedral angle between the pyrazole rings is 24.72?(10)° and the dihedral angles between the pyrazole rings and the adjacent phenyl rings are 58.67?(10) and 46.58?(11)°. The crystal structure is stabilized by weak C-H?? inter-actions involving the pyrazolone and phenyl rings.

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