Exhibit 4.2


 


NEITHER THIS SECURITY NOR THE SECURITIES
FOR WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION
OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES
ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES
ACT OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE SECURITIES
ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR TO SUCH
EFFECT, THE SUBSTANCE OF WHICH SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY. 


 


	No. [N-__]	[______], 2019


 


NeuroOne
Medical Technologies Corporation


 


Common
Stock Purchase Warrant


 


_________________


 


This
Certifies That, for value received, [________________], or his/her/its
registered assigns (the “Holder”), is entitled to subscribe for and purchase from NeuroOne
Medical Technologies Corporation, a Delaware corporation (the “Company”), at any time commencing
on [______], 2019 and expiring on November 1, 2022 (such period, the “Warrant
Exercise Term”), the Shares at the Exercise Price (each as defined in Section 1 below).


 


This Warrant is issued
in connection with the issuance of the Holder’s 13% convertible promissory note (the “Note”), pursuant
to Section 3.1(d) of the Note. Capitalized terms used and not otherwise defined herein shall have the respective meanings
assigned to such terms in the Note.


 


This Warrant is subject
to the following terms and conditions:


 


1. Shares.
The Holder has, subject to the terms set forth herein, the right to purchase, at any time during the Warrant Exercise Term, up
to [________________]  shares of Company’s common stock, par value $0.001 per
share (the “Common Stock”), at a per share exercise price of $1.87 (as the same may be adjusted as provided
in Section 3 hereof, the “Exercise Price”). The shares of Common Stock received upon any exercise
of this Warrant are referred to herein as the “Shares”.


 


2. Exercise
of Warrant. 


 


(a) Exercise.
This Warrant may be exercised by the Holder at any time during the Warrant Exercise Term, in whole or in part, by delivering to
the Company at its principal office, or at such other office as the Company may designate (i) the notice of exercise attached as
Exhibit A hereto (the “Notice of Exercise”), duly
executed by the Holder and (ii) this Warrant certificate, accompanied by (iii) payment, in cash or by wire transfer of immediately
available funds or by check payable to the order of the Company of the amount obtained by multiplying the number of Shares designated
in the Notice of Exercise by the Exercise Price (the “Purchase Price”). For purposes hereof, “Exercise
Date” shall mean the date on which all deliveries required to be made to the Company upon exercise of this Warrant
pursuant to this Section 2(a) shall have been made. In no event shall the Company be required to net cash settle any Warrant
exercise.


 






     


     


    

 


(b) Redemption.


 


(i)
All of the outstanding Warrants (but not less than all) may be redeemed, at the option of the Company, at any time beginning
after the one-year anniversary of the date hereof and during the Warrant Exercise Term upon notice to the Holder at the price
of $4.00 per Warrant (the “Redemption Price”), provided that the VWAP (as defined below) of the
Common Stock is at least 200% of the Exercise Price for 20 consecutive Trading Days immediately prior to both (A) the date on
which notice of redemption is give and (B) the Redemption Date (defined below). “VWAP” means, for
any date, the price determined by the first of the following clauses that applies: (A) if the Common Stock is then listed or
quoted on a Trading Market (other than the OTC Bulletin Board or OTC Markets, Inc.), the daily volume weighted average price
of the Common Stock for such date (or the nearest preceding Trading Day) on the Trading Market on which the Common Stock is
then listed or quoted as reported by Bloomberg L.P. (based on a Trading Day from 9:30 a.m. (New York City time) to 4:02 p.m.
(New York City time)), (B) if the Common Stock is then quoted on the OTC Bulletin Board, the volume weighted average price of
the Common Stock for such date (or the nearest preceding Trading Day) on the OTC Bulletin Board, (C) if the Common Stock is
not then listed or quoted for trading on the OTC Bulletin Board and if prices for the Common Stock are then reported on OTC
Markets, Inc. (or a similar organization or agency succeeding to its functions of reporting prices), the most recent bid
price per share of the Common Stock so reported, or (D) in all other cases, the fair market value of a share of Common
Stock as determined by an independent appraiser selected in good faith by the Holders of a majority in interest of the
Warrants then outstanding and reasonably acceptable to the Company, the fees and expenses of which shall be paid by the
Company. “Trading Day” means a day on which the principal Trading Market is open for trading. “Trading
Market” means any of the following markets or exchanges on which the Common Stock is listed or quoted for
trading on the date in question: the NYSE MKT, the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select
Market, the New York Stock Exchange (or any successors to any of the foregoing), the OTC Bulletin Board or OTC Markets,
Inc.


 


(ii) The
Company shall fix a date for the redemption (the “Redemption Date”). Notice of redemption shall be mailed
by first class mail, postage prepaid, by the Company not less than 30 days prior to the Redemption Date to the Holders to
be redeemed at their last addresses as they shall appear on the registration books. Any notice mailed in the manner herein provided
shall be conclusively presumed to have been duly given whether or not the Holder received such notice.


 


(iii) The
notice of redemption shall contain the information necessary to calculate the number of Shares to be received upon exercise of
the Warrants, including the VWAP calculations. On and after the Redemption Date, the record holder of the Warrants shall have no
further rights except to receive, upon surrender of the Warrants, the Redemption Price.


 






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(c) Issuance
of Shares. As soon as practicable after the exercise of this Warrant, in whole or in part, in accordance with Section 2(a)
hereof, the Company, at its expense, shall cause to be issued in the name of and delivered to the Holder (i) written confirmation
that the Shares have been issued in the name of the Holder, and (ii) a new warrant of like tenor to purchase all of the Shares
that may be purchased pursuant to the portion, if any, of this Warrant not exercised by the Holder.


 


3. Adjustment
of Exercise Price and Number of Shares. 


 


(a) Adjustment
for Reclassification, Consolidation or Merger. If while this Warrant, or any portion hereof, remains outstanding and unexpired
there shall be (i) a reorganization or recapitalization (other than a combination, reclassification, exchange or subdivision of
shares otherwise provided for herein), (ii) a merger or consolidation of the Company with or into another corporation or other
entity in which the Company shall not be the surviving entity, or a reverse merger in which the Company shall be the surviving
entity but the shares of the Company’s capital stock outstanding immediately prior to the merger are converted by virtue
of the merger into other property, whether in the form of securities, cash or otherwise, or (iii) a sale or transfer of the Company’s
properties and assets as, or substantially as, an entirety to any other corporation or other entity in one transaction or a series
of related transactions, then, as a part of such reorganization, recapitalization, merger, consolidation, sale or transfer, unless
otherwise directed by the Holder, all necessary or appropriate lawful provisions shall be made so that the Holder shall thereafter
be entitled to receive upon exercise of this Warrant during the Warrant Exercise Term and upon payment of the Exercise Price then
in effect, the greatest number of shares of capital stock or other securities or property that a holder of the Shares deliverable
upon exercise of this Warrant would have been entitled to receive in such reorganization, recapitalization, merger, consolidation,
sale or transfer if this Warrant had been exercised immediately prior to such reorganization, recapitalization, merger, consolidation,
sale or transfer, all subject to further adjustment as provided in this Section 3. If the per share consideration payable
to the Holder for Shares in connection with any such transaction is in a form other than cash or marketable securities, then the
value of such consideration shall be determined in good faith by the Board. The foregoing provisions of this paragraph shall similarly
apply to successive reorganizations, recapitalizations, mergers, consolidations, sales and transfers and to the capital stock or
securities of any other corporation that are at the time receivable upon the exercise of this Warrant. In all events, appropriate
adjustment shall be made in the application of the provisions of this Warrant with respect to the rights and interests of the Holder
after the transaction, to the end that the provisions of this Warrant shall be applicable after that event, as near as reasonably
may be, in relation to any shares or other property deliverable or issuable after such reorganization, recapitalization, merger,
consolidation, sale or transfer upon exercise of this Warrant.


 


(b) Adjustments
for Split, Subdivision or Combination of Shares. If the Company shall at any time subdivide (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) the shares of Common Stock subject to acquisition hereunder, then,
after the date of record for effecting such subdivision, the Exercise Price in effect immediately prior to such subdivision will
be proportionately reduced and the number of shares of Common Stock subject to acquisition upon exercise of the Warrant will be
proportionately increased. If the Company at any time combines (by reverse stock split, recapitalization, reorganization, reclassification
or otherwise) the shares of Common Stock subject to acquisition hereunder, then, after the record date for effecting such combination,
the Exercise Price in effect immediately prior to such combination will be proportionately increased and the number of shares of
Common Stock subject to acquisition upon exercise of the Warrant will be proportionately decreased.


 






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(c) Adjustments
for Dividends in Stock or Other Securities or Property. If while this Warrant, or any portion hereof, remains outstanding and
unexpired, the holders of any class of securities as to which purchase rights under this Warrant exist at the time shall have received
or, on or after the record date fixed for the determination of eligible stockholders, shall have become entitled to receive, without
payment therefor, other or additional stock or other securities or property (other than cash) of the Company by way of dividend,
then and in each case, this Warrant shall represent the right to acquire, in addition to the number of shares of such class of
security receivable upon exercise of this Warrant, and without payment of any additional consideration therefor, the amount of
such other or additional stock or other securities or property (other than cash) of the Company that such holder would be entitled
to receive had it been the holder of record of the class of security receivable upon exercise of this Warrant on the record date
fixed for the determination of stockholders eligible to receive such dividend, giving effect to all adjustments called for by the
provisions of this Section 3 that occur from such record date to the date of such exercise.


 


(d) [Reserved.]


 


(e) Notice
of Adjustments. Upon any adjustment of the Exercise Price and any increase or decrease in the number of Shares purchasable
upon the exercise of this Warrant, then, and in each such case, the Company, within 30 days thereafter, shall give written notice
thereof to the Holder at the address of such Holder as shown on the books of the Company, which notice shall state the Exercise
Price as adjusted and, if applicable, the increased or decreased number of Shares purchasable upon the exercise of this Warrant,
setting forth in reasonable detail the method of calculation of each. The Holder and any assignee, by acceptance of this Warrant,
acknowledge and agree that, by reason of the provisions of this Section 3, following any adjustment hereunder, the number
of Shares available for purchase hereunder at any given time may be less than the amount stated on the face hereof. 


 


4. Transfer
of Warrant. 


 


(a) Transfer
Restrictions. If, at the time of the surrender of this Warrant in connection with any transfer of this Warrant, the transfer
of this Warrant shall not be either (i) registered pursuant to an effective registration statement under the Securities Act and
under applicable state securities or blue sky laws or (ii) eligible for resale without volume or manner-of-sale restrictions or
current public information requirements pursuant to Rule 144, the Company may require, as a condition of allowing such transfer,
that the Holder or transferee of this Warrant, as the case may be, comply with certain transfer restrictions.


 


(b) Holder
Representation. The Holder, by the acceptance hereof, represents and warrants that it is acquiring this Warrant and, upon any
exercise hereof, will acquire the Shares issuable upon such exercise, for its own account and not with a view to or for distributing
or reselling such Shares or any part thereof in violation of the Securities Act or any applicable state securities law, except
pursuant to sales registered or exempted under the Securities Act.


 






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5. Notices. Any and all notices or other communications or deliveries required
or permitted to be provided hereunder shall be in writing and shall be deemed given and effective on the earliest of (a) the date
of transmission, if such notice or communication is delivered via e-mail transmission prior to 5:00 P.M., New York City time, on
a trading day, (b) the next trading day after the date of transmission, if such notice or communication is delivered via e-mail
transmission on a day that is not a trading day or later than 5:00 P.M., New York City time, on any trading day, (c) the trading
day following the date of mailing, if sent by U.S. nationally recognized overnight courier service with next day delivery specified,
or (d) upon actual receipt by the party to whom such notice is required to be given. The address and e-mail address for such notices
and communications shall be as follows:


 


If to the Company to:


 


NeuroOne Medical Technologies Corporation


10901 Red Circle Drive, Suite 150


Minnetonka, MN 54343


Attention: David A. Rosa


Email: daver@neurooneinc.com


 


With a copy (that shall not constitute notice)
to:


 


Honigman LLP


650 Trade Centre Way Suite 200


Portage, Michigan 49002


Attention: Phillip D. Torrence


Facsimile: (269) 337-7703


Email: ptorrence@honigman.com


 


If to the Holder
at its address or e-mail address as furnished in that certain subscription agreement entered into between the Holder and the Company
in connection with Holder’s purchase of the Note.


 


Either party may give
any notice, request, consent or other communication under this Warrant using any other means, but no such notice, request, consent
or other communication shall be deemed to have been duly given unless and until it is actually received by the party for whom it
is intended. Either party may change the address to which notices, requests, consents or other communications hereunder are to
be delivered by giving the other party notice in the manner set forth in this Section 5.


 


6. Legends.
The Holder acknowledges that each certificate evidencing the Shares acquired upon the exercise of this Warrant will
have restrictions upon resale imposed by state and federal securities laws. Each such certificate shall be stamped or imprinted
with a legend substantially in the following form:


 


THE SECURITIES REPRESENTED BY
THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES
LAWS OF ANY STATE AND MAY NOT BE SOLD OR TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT UNDER APPLICABLE FEDERAL
AND STATE SECURITIES LAWS OR PURSUANT TO AN APPLICABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS
OF THE ACT AND IN ACCORDANCE WITH APPLICABLE STATE SECURITIES LAWS AS EVIDENCED BY A LEGAL OPINION OF COUNSEL TO THE TRANSFEROR
TO SUCH EFFECT, WHICH OPINION SHALL BE REASONABLY ACCEPTABLE TO THE COMPANY.


 






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8. Fractional
Shares. No fractional Shares will be issued in connection with any exercise hereunder. Instead, the Company shall round
the number of Shares to be issued up to the nearest whole Share. This Warrant may only be exercised for whole shares.


 


9. Rights
of Stockholders. Except as expressly provided in Section 3(c) hereof, the Holder, as such, shall not be entitled
to vote or receive dividends or be deemed the holder of the Shares or any other securities of the Company that may at any time
be issuable on the exercise hereof for any purpose, nor shall anything contained herein be construed to confer upon the Holder,
as such, any of the rights of a stockholder of the Company or any right to vote for the election of directors or upon any matter
submitted to stockholders at any meeting thereof, or to give or withhold consent to any corporate action (whether upon any recapitalization,
issuance of stock, reclassification of stock, change of par value, consolidation, merger, conveyance, or otherwise) or to receive
notice of meetings, or otherwise until this Warrant shall have been exercised and the Shares purchasable upon the exercise hereof
shall have been issued, as provided herein.


 


10. Miscellaneous.


 


(a) All
questions concerning the construction, validity, enforcement and interpretation of this Warrant shall be determined in accordance
with the provisions of the Note. Wherever possible, each provision of this Warrant shall be interpreted in such manner as to be
effective and valid under applicable law, but if any provision of this Warrant shall be prohibited by or invalid under applicable
law, such provision shall be ineffective to the extent of such prohibition or invalidity, without invalidating the remainder of
such provisions or the remaining provisions of this Warrant.


 


(b) The
headings in this Warrant are for purposes of reference only, and shall not limit or otherwise affect any of the terms hereof.


 


(c) The
terms of this Warrant shall be binding upon and shall inure to the benefit of any successors or permitted assigns of the Company
and of the Holder and of the Shares issued or issuable upon the exercise hereof.


 


(d) This
Warrant and the other documents delivered pursuant hereto constitute the full and entire understanding and agreement between the
parties with regard to the subject hereof.


 


(e) The
Company shall not, by amendment of the certificate of incorporation or bylaws, or through any other means, directly or indirectly,
avoid or seek to avoid the observance or performance of any of the terms of this Warrant and shall at all times in good faith assist
in the carrying out of all such terms and in the taking of all such action as may be necessary or appropriate in order to protect
the rights of the Holder contained herein against impairment.


 


(f) Upon
receipt of evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and, in
the case of any such loss, theft or destruction, upon delivery of an indemnity agreement reasonably satisfactory in form and amount
to the Company, or, in the case of any such mutilation, upon surrender and cancellation of such Warrant, the Company, at its expense,
will execute and deliver to the Holder, in lieu thereof, a new Warrant of like date and tenor.


 


(g) This
Warrant and any provision hereof may be amended, waived or terminated only by the written consent of the Company and the holders
of a majority of the shares underlying the units received by investors in the conversion of the Series 3 Notes.


 


signature
page follows


 




    6


     


    

 


In
Witness Whereof, the Company has caused this Warrant to be signed by its duly authorized officer.


 


	 	NeuroOne Medical Technologies Corporation
	 	 	 
	 	By:	 
	 	Name:	David A. Rosa 
	 	Title:	Chief Executive Officer


 


Signature
Page to

Common Stock Purchase Warrant


 




     


     


    

 


Exhibit
A


 


NOTICE OF EXERCISE


 


To: NeuroOne
Medical Technologies Corporation


 


(1) The
undersigned hereby elects to purchase ________ Shares of the Company pursuant to the terms of the attached Warrant (only if exercised
in full), and tenders herewith payment of the exercise price in full, together with all applicable transfer taxes, if any, in the
form of cash in lawful money of the United States.


 


(2) Please
issue said Shares in the name of the undersigned or in such other name as is specified below:


 


_______________________________


 


The Shares shall be delivered to the following DWAC Account
Number:


 


_______________________________


 


_______________________________


 


_______________________________


 


(3) The undersigned is
an “accredited investor” as defined in Regulation D promulgated under the Securities Act of 1933, as amended.


 


[Holder]


 


Name of Investing Entity: ______________________________________________________________


 


Signature of Authorized Signatory of Investing Entity:
________________________________________


 


Name of Authorized Signatory: __________________________________________________________


 


Title of Authorized Signatory: ___________________________________________________________


 


Date: _______________________________________________________________________________


 




    A-1


     


    

 


ASSIGNMENT FORM


 


(To assign the foregoing
Warrant, execute this form and supply required information. Do not use this form to purchase shares.)


 


FOR VALUE RECEIVED,
the foregoing Warrant and all rights evidenced thereby are hereby assigned to


 


	Name:	 
	 	(Please Print)
	 	 
	Address:	 
	 	(Please Print)
	 	 
	Phone Number:	 
	 	 
	Email Address:	 
	 	 
	Dated: _______________ __, ______	 
	 	 
	Holder’s Signature:	 
	 	 
	Holder’s Address: