The molecular structures of methacrylates with bulky ester substituents, (RS)‐1,2,2,2‐tetraphenylethyl methacrylate and (1S, 2R)‐(+)‐1‐benzyl‐3‐dimethylamino‐2‐methyl‐1‐phenylpropyl methacrylate

Abstract

AbstractThe molecular structures of (RS)‐1,2,2,2‐tetraphenylethyl methacrylate (TrBzMA) and (1S, 2R)‐(+)‐1‐benzyl‐3‐dimethylamino‐2‐methyl‐1‐phenylpropyl methacrylate (ChMA) were determined by means of X‐ray diffraction: (RS)‐TrBzMA .0,5C6H6; triclinic, space group P1, a = 9,271(2), b = 33,965(4), c = 9,167(2) Å, α = 90,26(2), β = 118,80(2), γ = 88,03(2)°, and Z = 4; ChMA; monoclinic, space group P21, a = 12,482(1), b = 9,184(1), c = 9,246(1) Å, β = 93,49(1)°, and Z = 2. Both structures were solved by the direct method and refined by the block‐diagonal least‐squares procedure to R = 0,054 and 0,057 for non‐zero reflections, respectively. Both of the two crystallographically independent molecules of TrBzMA have the same structure; each molecule has a synperiplanar (sp) conformation as to the CC and CO double bonds about the C(1)C(2) bond and also an sp conformation as to the CO and CO bonds about the C(1)O(1) bond. The ChMA molecule has an antiperiplanar (ap) and a sp conformation about the C(1)C(2) and C(1)O(1) bonds, respectively.