The title compound, (C6H11)3PS (systematic name: tri-cyclo-hexyl-λ5-phosphane-thione), is a triclinic (P-1, Z' = 1) polymorph of the previously reported ortho-rhom-bic form (Pnma, Z' = 1/2) [Kerr et al. (1977 ▸). Can. J. Chem. 55, 3081-3085; Reibenspies et al. (1996 ▸). Z. Kristallogr. 211, 400]. While conformational differences exist between the non-symmetric mol-ecule in the triclinic polymor...

The new title 4-thia-zolidinone derivative, C16H21N3O3S, was obtained from the cyclization reaction of 4-methyl-3-thio-semicarbazone and dimethyl acetyl-enedi-carboxyl-ate (DMAD). The cyclo-hexyl-idene ring has an envelope conformation with the stereogenic centre C atom as the flap. Its mean plane makes a dihedral angle of 56.23 (9)° with the thia-zolidine ring mean plane. In the crystal, mol-e...

The asymmetric unit of the title compound, C(15)H(18)BrN(3)O(2)S, contains two independent mol-ecules in both of which the (thia-zine)C=N-N double bond exhibits an E conformation. The cyclo-hexyl rings adopt chair conformations while the thia-zine rings are in sofa conformations. The mean planes of these rings are oriented at dihedral angles of 64.43 (13) and 28.6 (2)° in the two independent mo...

In the title compound, C(21)H(21)BrO(3)S, the cyclo-hexyl ring adopts a chair conformation. The 4-bromo-phenyl ring makes a dihedral angle of 80.88 (6)° with the mean plane of the benzofuran fragment. An intra-molecular C-H⋯O hydrogen bond is formed between an O atom of the sulfonyl group and one H atom of the aromatic ring such that a five-membered ring is formed. The crystal packing is stabil...

In the title compound, [Ag{P(C(6)H(11))(2)(C(6)H(5))}(2)]ClO(4)·CH(2)Cl(2), the Ag(I) atom in the mononuclear complex cation is coordinated by two P atoms of the phosphane ligands [Ag-P = 2.3993 (4) and 2.4011 (4) Å; P-Ag-P = 177.473 (18)°] and the perchlorate anion acts as the counter-anion. There is an Ag⋯O(perchlorate) inter-action of 2.873 (2) Å, which contributes to the slightly non-linear...

The title compound, C(29)H(37)NO(2), crystallized with two independent mol-ecules in an asymmetric unit in which the conformation of the cyclo-hexyl ring of the pregnene moiety bonded to the 3α-(1,3-dioxoisoindolin-2-yl)- ring system differs: in one mol-ecule it is in a chair conformation, while in the other it exhibits a half-chair conformation. The other six-membered rings in the pregnene moi...

The asymmetric unit of the title compound, C26H23FO2S, contains two independent mol-ecules (A and B), in both of which the cyclo-hexyl ring adopts a chair conformation. The benzo-furan ring systems, the 4-fluoro-phenyl and phenyl rings are essentially planar, with r.m.s. deviations of 0.008 (1), 0.002 (1) and 0.003 (1) Å, respectively, for mol-ecule A, and 0.016 (1), 0.004 (1) and 0.002 (1) Å, ...

In the title compound, C(14)H(30)N(3)OP, both cyclo-hexyl groups adopt chair conformations with the NH unit in an equatorial position. The P atom adopts a slightly distorted tetra-hedral environment. In the (CH(3))(2)NP(O) unit, the O-P-N-C torsion angles, showing the orientations of the methyl groups with respect to the phosphoryl group, are -166.6 (3) and 34.6 (4)°. The O atom of the P=O grou...

Using a general solvent-free procedure for the synthesis of chiral Schiff bases, the following compounds were synthesized and their crystal structures determined: (S)-(+)-2-{[(1-phenyl-eth-yl)imino]-meth-yl}naphthalene, C19H17N, (1), (S)-(+)-2-({[(4-methyl-phen-yl)eth-yl]imino}-meth-yl)naphthalene, C20H19N, (2), (R)-(-)-2-({[(4-meth-oxy-lphen-yl)eth-yl]imino}-meth-yl)naphthalene, C20H19NO, (3),...

Abstract Under different concentrations of the base potassium deuteroxide KOD, progress reactions, such as enolization, D‐substitution, isomerization, and conformational changes diketopiperazine cyclo(L‐Pro‐L‐Xxx) cyclo(D‐Pro‐L‐Xxx) (Xxx = Phe, Tyr) in D 2 O solution, was investigated by 1 H nuclear magnetic resonance (NMR). Cyclo(L‐Pro‐L‐Xxx) is mostly isomerized to whereas only slightly even ...