(�T�I���o`[K��L��n�w�դ2|��{�׻�����a�H��l��P���*��ڠ"�(,�����F6�\� <> I)�㯡~؁��fP����O�f�wh��~�&hvYrXoӎ�W���.2 s �À/���I�[b��� #�l$p����.~�ᠴ��;���؈L_w�N��Y�m�Y0/vǏ(�9c�,�$spc��v���;�)����1#����-��F��8_�u\�d��Q�4����FEX�x�OJ7IJ�[d�B�҃ݑ}��RX�)R֑T��Z(�oF��U��B���^�d�1��O��ĚG�gf�1�扠������d�)�lA�ƘѸ�M|#,ْ��O�9@!��C���h���#�S� z')�ɸ��t��^�k�pt�y��fsR}L��D�Y�x�)����3U�Z� ��sƘ9}2��m Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. ����|(��i��+�6�>`Y`w�o.���mU7�t������Z����̪�jv�5�pz=�d���9]^��b�0�^�-p��i_�- A�Sma�a�*�a�)8O�K��Xc 11.09 Solving Problems using Mass Spectrometry, 11.08: Fragmentation Patterns in Mass Spectrometry, 11.10 Solving Problems using IR and Mass Spec. 5 0 obj %PDF-1.5 13C nmr: 8 peaks = 8 types of C. 167 ppm C=O (probably an acid derivative) 4 types between 125-140 ppm = aromatic C 60 ppm is typical of a C bond to an electronegative atom 22 and 14 ppm most likely from … chem2001: mass spectrometry practice problems (solutions) 1.0079 12.011 68.118 (ii) signal at 68 signal at 68 (iv) mass lost 15. likely fragment ch3 charge of %�쏢 %�쏢 We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. IR: 1710cm-1 C=O, 1600cm-1 C=C, 1275 and 1100cm-1 C-O possible. Match the spectrum with the compound and draw the fragment ion that corresponds to the base peak. CHM 202 - Mass Spectrometry Problems (with some IR) 1. MASS S PECTROMETRY (MS) Exercise 1: Determine the degree of unsaturation (IHD) for the hydrocarbons with the following molecular formulas: (a) C10 H16 HDI = 3 (b)C7H7NO HDI = 5 (c) C8H9ClO HDI = 4 Exercise 2: An unknown substance shows a molecular ion peak at m/z = 170 with a relative intensity of 100. The M + 1 peak has an intensity of 13.2, and the M + 2 peak has an intensity … @�V?8�ɐ�B�vO�������(�vݧ9�f�DGڬl���#;M���^�O����@*�������`����O�=��F��~��,W�q�D��0:ϪV�h��?\�{�k��8/"��K�Q�ջb�*vA[�=��D�O�@�\�QV�v�w����&�?�*� Draw the two structures. Videos. Mass spectrometry of elements. The two mass spectra below correspond to two isomers of C 5H10 O: 3-methyl-2-butanone and 3-pentanone. Video tutorial. stream WORKED SOLUTION Mass spectrum: M+ gives MW = 164 g/mol , no isotope pattern for Cl or Br. Mass spec interpretation. Example problem. � Qd|;�S��Z�Ҍ���J�����TӨ,y�\����Brv�~�,5�r�A�CG6f$"���K�۹Hc���-T��0�� _CP�fy'�9B� 'KLkYĐ��!�����8�`�CBٮ���#�I.zD$ly�~��t$���B2��=��k��e��V���������V'�R,��.�F�8[�:_��-GV�n���)�������jS����.�fT��s��|�1#*<0;��#(��cs*,����N�6����OM��S�8f>�������#l,��'�͡( a&�h�E���w�ij�#���k������dd���|\o�ܽ(��M\�bA�w�V�,`�"������X���r_��]$�|ZYF�>� ��͇�2a��ȅف�R�|�FD�h��-_� ���q�@N�8"�s����z�$�T��}. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Legal. Watch the recordings here on Youtube! Mass spectrometry of elements. x��W[�E��.��:��ɴ]��W�11�@���F��,��į{.]�gN�=u����s�jE���w�]6?����rܾ�u>�o���L�S����i��)m���V)EC�N-��ltRη�����,\���A����;�Y�D�t�+ϖ�;靊! Slide Presentations. Missed the LibreFest? The three compounds shown below are structural isomers of each other. %PDF-1.4 5 0 obj 11.09 Solving Problems using Mass Spectrometry Last updated; Save as PDF Page ID 42180; Additional Resources ; Additional Resources. Sample questions on Analytical MS. Mass spec practice problems. 3�M��r�)�~�{�}!_�U0.��*�z1Vq�d �t����-�d�� ػ���H�AGk��(���NZ�9�y;�M��s�݊>�CX)�/K�(�C@B�8L��`��f��c�M��ݺ��da�F�� ]� V �n�C�4�0��"c�#�>V�kq|G m&. a) b) 2. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. <> Have questions or comments? Analysing mass spectra video. AP.Chem: SPQ‑1 (EU), SPQ‑1.B (LO), SPQ‑1.B.1 (EK), SPQ‑1.B.2 (EK) Google Classroom Facebook Twitter. stream Mass spec interpretation presenation. x��[Y�\��`�baf�/c��9��}��)��t���H��/�>�OW���9�[��e4��U]�WU}�H��F�����6?��L�$��vs���δ�r�2���(6?�����|��ۿL��(��_�������%�ō�B����D4E�l�]m�͌m����϶o���[��lG�e�S�Ƕ>:)����=΃ǖ�k�N�d���)����V��7��j�ia�4v�����*���� �@��Ay:"mo�Ť�O�M�������E��l����}��c���m�Qv��-��B��kja��f{k����:�@�����OLr8ЍdNԌ�D�YR��Rĉ���em����Mt0�zX8�"����Z\dc0‚4�I�/A8 ��:+�I)��tp�6�l�j(os����G��������$3��@�߁W�"��n�C��N���kCt�X�8C۔3�k;��i�a,�׽ٮ�X�C^yy|��g! Email. No OH (about 3500cm-1). Tutorial. … We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Web Pages.