The unit cell and space group of voachalotine

Redetermination of 9,10-dimethylanthracene

“…1) with site occupancy factors 0.55 (3) and 0.45 (3). Apart from this disorder and the higher precision of the geometric parameters [σ(C-C) = 0.002-0.003 Å in the present work, compared with 0.009-0.012 Å in the earlier work (Iball & Low, 1974)], the results obtained agree well with the already published data. In the crystal structure of (I) the asymmetric unit consists of a half-molecule whereas the other half is generated by a centre of inversion.…”

“…For the previous structure determination, see: Iball & Low (1974) [refcode DMANTR, Cambridge Structural Database, Version 5.28; Allen, 2002)].…”

“…In the literature, there is a single paper related to the crystal structure of 9,10-dimethylanthracene (I) [Iball & Low, 1974; CSD refcode DMANTR (Cambridge Structural Database, Version 5.28; Allen, 2002)]. In that determination, a reliability factor was R=0.080 for 712 data, and hydrogen atom coordinates were included in calculated positions without any refinement.…”

The crystal and molecular structure of cis-dichlorobis(cyclohexylamine)platinum(II)

“…One series of Pt complexes that are significantly better anti-tumour agents than the parent cis-dichlorodiamineplatinum(II) are cis-dichloro derivatives of Pt coordinated to an aromatic or alicyclic diamine or two alicyclic amines (Connors, Jones, Ross, Braddock, Khokhar & Tobe, 1972). The structures of cisdichloroethylenediamineplatinum(II) (Iball, Macdougall & Scrimgeour, 1975) and cis-and trans-dichlorobis-(ethyleneimine)platinum(II) (Barnes, IbaU & Weakley, 1975) of this series have been reported. We now report the structure of the bis(cyclohexylamine) derivative, which is 30 times more selective than cis-dichlorodiamineplatinum(II) against certain tumours.…”

trans-Dibromobis(cyclohexylamine)platinum(II)

“…The molecular structure is very similar to that observed for the corresponding chloro complex (Zanotti, Del Pra, Bombieri & Tamburro, 1978). Thus the bonded ligand atoms form a strict square plane, and there is no twisting of the two halves of the square plane as was claimed for cis-dichlorobis(cyclohexylamine)platinum(II) (Iball & Scrimgeour, 1977). The Pt-Br distance [2.388 (2) A] is 0.086 ,/k longer than the corresponding Pt-C1 distance whereas both the covalent radii and ionic radii of Br and C1 differ by (1) Pt-N-C(1) 117.3 (9) N-C(1) 1.49 (2) N-C(1)-C(2) 112 (1) C(1)-C(2) 1.51 (2) N-C(1)-C(6) 110 (1) Table 1 by (a) -x, 1 -y, 1 -z and (b) 1 -x, 1 -y, 1 -z. about 0.16 A (Cotton & Wilkinson, 1972).…”