# $L$-Arginyl-$L$-glutamic Acid Dihydrate, $C_{11}H_{21}N_{5}O_{5}.2H_2O$

Pandit, J and Seshadri, TP and Viswamitra, MA (1983) $L$-Arginyl-$L$-glutamic Acid Dihydrate, $C_{11}H_{21}N_{5}O_{5}.2H_2O$. In: Acta Crystallographica, Section C: Crystal Structure Communications, 39 (12). pp. 1669-1672.

 PDF a22840.pdf Restricted to Registered users only Download (437Kb) | Request a copy

## Abstract

$M_r = 339.35$, monoclinic, $P2_1$, a = 11.028 (2), b=9.583 (2), $c = 16.010 (2) \AA$, $\beta = 96.57 (1)^0$, $U = 1680.85 \AA^3$, Z = 4, $D_m = 1.37$, $D_x = 1.34 Mg m^{-3}$, $CuK\alpha$, $\lambda = 1.54184 \AA$, $\mu = 0.85 mm^{-1}$, F(000) = 728, T = 300K, R = 0.085 for 2845 diffractometer-measured reflections $[F_0 > 3\sigma(F_0)]$. The two molecules in the asymmetric unit have similar conformations except for a static disorder at the $C^{\beta}$ and $C^{\gamma}$ positions in one of the glutamic-acid side chains. An interesting feature of the crystal structure is a pair of hydrogen bonds between the guanidinium and \gamma-carboxylate groups of neighbouring molecules. This is the first such specific interaction observed between side chains of arginine and glutamic acid.

Item Type: Journal Article Copyright of this article belongs to International Union of Crystallography. Division of Physical & Mathematical Sciences > Physics 08 Jul 2008 19 Sep 2010 04:46 http://eprints.iisc.ernet.in/id/eprint/14647
{"extraction_info": {"found_math": true, "script_math_tex": 0, "script_math_asciimath": 0, "math_annotations": 0, "math_alttext": 0, "mathml": 0, "mathjax_tag": 0, "mathjax_inline_tex": 1, "mathjax_display_tex": 0, "mathjax_asciimath": 0, "img_math": 0, "codecogs_latex": 0, "wp_latex": 0, "mimetex.cgi": 0, "/images/math/codecogs": 0, "mathtex.cgi": 0, "katex": 0, "math-container": 0, "wp-katex-eq": 0, "align": 0, "equation": 0, "x-ck12": 0, "texerror": 0, "math_score": 0.9451434016227722, "perplexity": 4989.453898701296}, "config": {"markdown_headings": true, "markdown_code": false, "boilerplate_config": {"ratio_threshold": 0.18, "absolute_threshold": 10, "end_threshold": 15, "enable": true}, "remove_buttons": true, "remove_image_figures": true, "remove_link_clusters": true, "table_config": {"min_rows": 2, "min_cols": 3, "format": "plain"}, "remove_chinese": true, "remove_edit_buttons": true, "extract_latex": true}, "warc_path": "s3://commoncrawl/crawl-data/CC-MAIN-2015-22/segments/1432207924919.42/warc/CC-MAIN-20150521113204-00306-ip-10-180-206-219.ec2.internal.warc.gz"}