Showing papers by "Thomas A. Hamor published in 1993"
TL;DR: In this article, the valence angles at P fall into two categories: the three O-P-C angles, 111.8 (2), 112.0 (2) and 113.4 (2).
Abstract: C 18 H 15 OP, M r =278.3, orthorhombic, Pbca, a=29.085 (15), b=9.149 (4), c=11.266 (5) A, V=2997.9 A 3 , Z=8, D x =1.233 g cm -3 , λ(Mo Kα)=0.71069 A, μ=1.170 cm -3 , F(000)=1168, T=295 K, R=0.048 for 1156 observed reflections. The P-O and three P-C bond lengths are 1.487 (3), and 1.795 (5), 1.799 (5) and 1.804 (5) A, respectively. The valence angles at P fall into two categories: the three O-P-C angles, 111.8 (2), 112.0 (2) and 113. 3 (2) o , and the three C-P-C angles, each significantly smaller at 106.4 (2) o
29 citations
TL;DR: In this paper, a 1 : 1 compound, L*CdX, where L* = hydridotris(3,5-dimethylpyrazoyl)borate and X = Cl, I, met with limited success.
23 citations
TL;DR: In this paper, the crystal and molecular structure of 2 has been determined: monoclinic, space group P21/n, with a= 11.010(4), b= 9.231(2), c= 14.862(7)A, β= 110.80(4)° and Z= 4; R= 0.0533 for 1180 observed reflections.
Abstract: Reaction of 2-(Br3Te)C6H4CHNC6H4Me-p1 with BH4– results in reduction at both the tellurium and double-bond centres to afford 2-(BrTe)C6H4CH2NH(C6H4Me-p)2, however substitution of p-tolyl by a more sterically demanding group such as 2,4,6-tri-tert-butylphenyl precludes reduction of the double bond. The crystal and molecular structure of 2 has been determined: monoclinic, space group P21/n, with a= 11.010(4), b= 9.231(2), c= 14.862(7)A, β= 110.80(4)° and Z= 4; R= 0.0533 for 1180 observed reflections. The tellurium atom is three-co-ordinate with Br–Te–N 165.3(3), Br–Te–C(1) 91.5(4) and N–Te–C(1) 74.9(5)° and Te–C(1) 2.125(16), Te–Br 2.663(3)A and a Te ⋯ N interaction of 2.375(13)A. A survey of available structural data for ortho-tellurated compounds suggests this interaction to be stronger when the donor nitrogen atom is sp2 rather than sp3 hybridised. A multinuclear (1H, 13C, 123Te, 125Te) and variable-temperature (1H) NMR study of compound 2 in chloroform solution is interpreted in terms of an equilibrium between N(sp3) co-ordinated and non-co-ordinated forms. New multinuclear (1H, 19F, 123Te) NMR together with Raman data for related compounds containing Te ⋯ N(sp2) interactions e.g. 2-XTeC6H4CHNC6H4Me-p(X = F, Cl, Br or I) provide further support for the reality of the intramolecular co-ordination and ν(Te–N) is assigned in the region 206–219 cm–1.
23 citations
TL;DR: In this article, the valence angles at P fall into two categories: the three O-P-C angles, 111.8 (2), 112.0 (2) and 113.4 (2).
Abstract: C 18 H 15 OP, M r =278.3, orthorhombic, Pbca, a=29.085 (15), b=9.149 (4), c=11.266 (5) A, V=2997.9 A 3 , Z=8, D x =1.233 g cm -3 , λ(Mo Kα)=0.71069 A, μ=1.170 cm -3 , F(000)=1168, T=295 K, R=0.048 for 1156 observed reflections. The P-O and three P-C bond lengths are 1.487 (3), and 1.795 (5), 1.799 (5) and 1.804 (5) A, respectively. The valence angles at P fall into two categories: the three O-P-C angles, 111.8 (2), 112.0 (2) and 113. 3 (2) o , and the three C-P-C angles, each significantly smaller at 106.4 (2) o
2 citations
TL;DR: In this article, the molecular structure of one isomer of [{Mo(NO)L * Cl} 2 (μ-S 2 )] was determined crystallographically and the compound contains an MoSS-Mo core with short Mo-S distances of 2.310 A, but no direct metal-metal bond.
1 citations